Physics Exam 2 Chapter 5N-New

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Physics 1401 - Exam 2 Chapter 5N-New"

Transcription

1 Physics Exam 2 Chapter 5N-New 2. The second hand on a watch has a length of 4.50 mm and makes one revolution in s. What is the speed of the end of the second hand as it moves in uniform circular motion? (a) m/s (c) m/s (e) m/s (b) m/s (d) m/s 3. Approximately one billion years ago, the Moon orbited the Earth much closer than it does today. The radius of the orbit was only km. Today, the radius is km. The orbital period was only s. The present period is s. Assume that the orbit of the Moon is circular. Calculate the ratio of the speed of the Moon in its ancient orbit to the speed that it has today. (a) 15.8 (c) 10.2 (e) 6.39 (b) 12.8 (d) A ball is whirled on the end of a string in a horizontal circle of radius R at constant speed v. The centripetal acceleration of the ball can be increased by a factor of 4 by (a) keeping the speed fixed and increasing the radius by a factor of 4. (b) keeping the radius fixed and increasing the speed by a factor of 4. (c) keeping the radius fixed and increasing the period by a factor of 4. (d) keeping the radius fixed and decreasing the period by a factor of 4. (e) keeping the speed fixed and decreasing the radius by a factor of A car traveling at 20 m/s rounds a curve so that its centripetal acceleration is 5 m/s2. What is the radius of the curve? (a) 4 m (c) 80 m (e) 640 m (b) 8 m (d) 160 m Review Exam 2-New.doc - 1 -

2 8. A satellite is placed in a circular orbit to observe the surface of Mars from an altitude of 144 km. The equatorial radius of Mars is 3397 km. If the speed of the satellite is 3480 m/s, what is the magnitude of the centripetal acceleration of the satellite? (a) 2.17 m/s 2 (c) 2.99 m/s 2 (e) 4.05 m/s 2 (b) 2.60 m/s 2 (d) 3.42 m/s A boy is whirling a stone around his head by means of a string. The string makes one complete revolution every second, and the tension in the string is FT. The boy then speeds up the stone, keeping the radius of the circle unchanged, so that the string makes two complete revolutions every second. What happens to the tension in the sting? (a) The tension is unchanged. (b) The tension reduces to half of its original value. (c) The tension increases to twice its original value. (d) The tension increases to four times its original value. (e) The tension reduces to one-fourth of its original value. 14. Sara puts a box into the trunk of her car. Later, she drives around an unbanked curve that has a radius of 48 m. The speed of the car on the curve is 16 m/s, but the box remains stationary relative to the floor of the trunk. Determine the minimum coefficient of static friction for the box on the floor of the trunk. (a) 0.42 (d) 0.33 (b) 0.54 (e) This cannot be determined without knowing the mass of (c) 0.17 the box. 15. In an amusement park ride, a small child stands against the wall of a cylindrical room that is then made to rotate. The floor drops downward and the child remains pinned against the wall. If the radius of the device is 2.15 m and the relevant coefficient of friction between the child and the wall is 0.400, with what minimum speed is the child moving if he is to remain pinned against the wall? (a) 7.26 m/s (c) 12.1 m/s (e) 9.80 m/s (b) 3.93 m/s (d) 5.18 m/s Review Exam 2-New.doc - 2 -

3 18. The maximum speed at which a car can safely negotiate an unbanked curve depends on all of the following factors except (a) the diameter of the curve. (b) the acceleration due to gravity. (c) the coefficient of static friction between the road and the tires. (d) the coefficient of kinetic friction between the road and the tires. (e) the ratio of the static frictional force between the road and the tires and the normal force exerted on the car. 20. Determine the minimum angle at which a roadbed should be banked so that a car traveling at 20.0 m/s can safely negotiate the curve if the radius of the curve is m. (a) (c) 11.5 (e) 78.2 (b) (d) 19.6 Questions 23 through 25 pertain to the statement below: A 1000-kg car travels along a straight 500-m portion of highway (from A to B) at a constant speed of 10 m/s. At B, the car encounters an unbanked curve of radius 50 m. The car follows the road from B to C traveling at a constant speed of 10 m/s while the direction of the car changes from east to south. 23. What is the magnitude of the acceleration of the car as it travels from A to B? (a) 2 m/s 2 (c) 10 m/s 2 (e) zero m/s 2 (b) 5 m/s 2 (d) 20 m/s What is the magnitude of the acceleration of the car as it travels from B to C? (a) 2 m/s 2 (c) 10 m/s 2 (e) zero m/s 2 (b) 5 m/s 2 (d) 20 m/s What is the magnitude of the frictional force between the tires and the road as the car negotiates the curve from B to C? (a) N (c) 5000 N (e) 1000 N (b) N (d) 2000 N Review Exam 2-New.doc - 3 -

4 26. The earth exerts the necessary centripetal force on an orbiting satellite to keep it moving in a circle at constant speed. Which statement best explains why the speed of the satellite does not change although there is a net force exerted on it? (a) The satellite is in equilibrium. (b) The acceleration of the satellite is zero m/s 2. (c) The centripetal force has magnitude mv 2 /r. (d) The centripetal force is canceled by the reaction force. (e) The centripetal force is always perpendicular to the velocity. 30. A satellite is placed in equatorial orbit above Mars, which has a radius of 3397 km and a mass MM = kg. The mission of the satellite is to observe the Martian climate from an altitude of 488 km. What is the orbital period of the satellite? (a) s (c) s (e) s (b) s d) s 45. A 25-kg box is sliding down an ice-covered hill. When it reaches point A, the box is moving at 11 m/s. Point A is at the bottom of a circular arc that has a radius R = 7.5 m. What is the magnitude of the normal force on the box at Point A? (a) 250 N (d) 650 N (b) 280 N (e) 900 N (c) 400 N Review Exam 2-New.doc - 4 -

5 Questions 49 through 52 pertain to the situation described below: A 1500-kg car travels at a constant speed of 22 m/s around a circular track that has a radius of 85 m. 49. Which statement is true concerning this car? (a) The velocity of the car is changing. (b) The car is characterized by constant velocity. (c) The car is characterized by constant acceleration. (d) The car has a velocity vector that points along the radius of the circle. (e) The car has an acceleration vector that is tangent to the circle at all times. 50. What is the magnitude of the acceleration of the car? (a) 5.7 m/s 2 (c) 9.8 m/s 2 (e) zero m/s 2 (b) 0.26 m/s 2 (d) 1.2 m/s What is the average velocity of the car during one revolution? (a) 8.0 m/s (c) 26 m/s (e) zero m/s (b) 12 m/s (d) 44 m/s 52. Determine the magnitude of the net force that acts on the car. (a) 390 N (c) N (e) zero newtons (b) 1800 N (d) N 53. Jupiter has a mass that is roughly 320 times that of the Earth and a radius equal to 11 times that of the Earth. What is the acceleration due to gravity on the surface of Jupiter? (a) 2.7 m/s 2 (c) 26 m/s 2 (e) 260 m/s 2 (b) 9.8 m/s 2 (d) 87 m/s 2 Review Exam 2-New.doc - 5 -

6 Physics 1401 Chapter 6 Review - Energy 1. In which one of the following situations is zero net work done? (a) A ball rolls down an inclined plane. (b) A physics student stretches a spring. (c) A projectile falls toward the surface of Earth. (d) A box is pulled across a rough floor at constant velocity. (e) A child pulls a wagon across a rough surface causing it to accelerate. 3. A concrete block is pulled 7.0 m across a frictionless surface by means of a rope. The tension in the rope is 40 N; and the net work done on the block is 247 J. What angle does the rope make with the horizontal? (a) 28 (c) 47 (e) 88 (b) 41 (d) A force of magnitude 25 N directed at an angle of 37 above the horizontal moves a 10- kg crate along a horizontal surface at constant velocity. How much work is done by this force in moving the crate a distance of 15 m? (a) zero joules (c) 40 J (e) 300 J (b) 1.7 J (d) 98 J Review Exam 2-New.doc - 6 -

7 7. A constant force of 25 N is applied as shown to a block which undergoes a displacement of 7.5 m to the right along a frictionless surface while the force acts. What is the work done by the force? (a) zero joules (c) 94 J (e) 160 J (b) +94 J (d) +160 J 11. Which one of the following statements concerning kinetic energy is true? (a) It can be measured in watts. (b) It is always equal to the potential energy. (c) It is always positive. (d) It is a quantitative measure of inertia. (e) It is directly proportional to velocity. 15. The kinetic energy of a car is J as it travels along a horizontal road. How much work is required to stop the car in 10 s? (a) zero joules (c) J (e) J (b) J (d) J Review Exam 2-New.doc - 7 -

8 18. A 10.0-g bullet traveling horizontally at 755 m/s strikes a stationary target and stops after penetrating 14.5 cm into the target. What is the average force of the target on the bullet? (a) N (c) N (e) N (b) N (d) N 22. An elevator supported by a single cable descends a shaft at a constant speed. The only forces acting on the elevator are the tension in the cable and the gravitational force. Which one of the following statements is true? (a) The magnitude of the work done by the tension force is larger than that done by the gravitational force. (b) The magnitude of the work done by the gravitational force is larger than that done by the tension force. (c) The work done by the tension force is zero joules. (d) The work done by the gravitational force is zero joules. (e) The net work done by the two forces is zero joules. 24. A 1500-kg elevator moves upward with constant speed through a vertical distance of 25 m. How much work was done by the tension in the cable? (a) 990 J (c) J (e) J (b) 8100 J (d) J Review Exam 2-New.doc - 8 -

9 26. Two balls of equal size are dropped from the same height from the roof of a building. One ball has twice the mass of the other. When the balls reach the ground, how do the kinetic energies of the two balls compare? (a) The lighter one has one fourth as much kinetic energy as the other does. (b) The lighter one has one half as much kinetic energy as the other does. (c) The lighter one has the same kinetic energy as the other does. (d) The lighter one has twice as much kinetic energy as the other does. (e) The lighter one has four times as much kinetic energy as the other does. 28. A woman stands on the edge of a cliff and throws a stone vertically downward with an initial speed of 10 m/s. The instant before the stone hits the ground below, it has 450 J of kinetic energy. If she were to throw the stone horizontally outward from the cliff with the same initial speed of 10 m/s, how much kinetic energy would it have just before it hits the ground? (a) 50 J (c) 450 J (e) 950 J (b) 100 J (d) 800 J 30. A block is dropped from a high tower and is falling freely under the influence of gravity. Which one of the following statements is true concerning this situation? Neglect air resistance. (a) As the block falls, the net work done by all of the forces acting on the block is zero joules. (b) The kinetic energy increases by equal amounts over equal distances. (c) The kinetic energy of the block increases by equal amounts in equal times. (d) The potential energy of the block decreases by equal amounts in equal times. (e) The total energy of the block increases by equal amounts over equal distances. Questions 37 and 38 pertain to the situation described below: Review Exam 2-New.doc - 9 -

10 A 2.0-kg projectile is fired with initial velocity components v ox = 30 m/s and v oy = 40 m/s from a point on the earth's surface. Neglect any effects due to air resistance. 37. What is the kinetic energy of the projectile when it reaches the highest point in its trajectory? (a) zero joules (c) 1600 J (e) 4900 J (b) 900 J (d) 2500 J 38. How much work was done in firing the projectile? (a) 900 J (c) 2500 J (e) 9800 J (b) 1600 J (d) 4900 J Review Exam 2-New.doc

11 39. Two boxes are connected to each other as shown. The system is released from rest and the 1.00-kg box falls through a distance of 1.00 m. The surface of the table is frictionless. What is the kinetic energy of box B just before it reaches the floor? (a) 2.45 J (d) 29.4 J (b) 4.90 J (e) 39.2 J (c) 9.80 J 42. A bicyclist is traveling at a speed of 20.0 m/s as he approaches the bottom of a hill. He decides to coast up the hill and stops upon reaching the top. Determine the vertical height of the hill. (a) 28.5 m (c) 11.2 m (e) 20.4 m (b) 3.70 m (d) 40.8 m 45. An engineer is asked to design a playground slide such that the speed a child reaches at the bottom does not exceed 6.0 m/s. Determine the maximum height that the slide can be. (a) 1.8 m (c) 3.2 m (e) 14 m (b) 2.9 m (d) 4.5 m Review Exam 2-New.doc

12 50. The initial velocity of a 4.0-kg box is 11 m/s, due west. After the box slides 4.0 m horizontally, its speed is 1.5 m/s. Determine the magnitude and the direction of the nonconservative force acting on the box as it slides. (a) 42 N, due west (c) 31 N, due east (e) 83 N, due west (b) 120 N, due east (d) 59 N, due east 51. An automobile approaches a barrier at a speed of 20 m/s along a level road. The driver locks the brakes at a distance of 50 m from the barrier. What minimum coefficient of kinetic friction is required to stop the automobile before it hits the barrier? (a) 0.4 (c) 0.6 (e) 0.8 (b) 0.5 (d) 0.7 Review Exam 2-New.doc

13 55. A 51-kg woman runs up a flight of stairs in 5.0 s. Her net upward displacement is 5.0 m. Approximately, what average power did the woman exert while she was running? (a) 5.0 kw (c) 0.75 kw (e) 0.25 kw (b) 1.0 kw (d) 0.50 kw 57. An escalator is 30.0 meters long and slants at 30.0 relative to the horizontal. If it moves at 1.00 m/s, at what rate does it do work in lifting a 50.0 kg man from the bottom to the top of the escalator? (a) 49.3 W (c) 245 W (e) 495 W (b) 98.0 W (d) 292 W 59. A warehouse worker uses a forklift to lift a crate of pickles on a platform to a height 2.75 m above the floor. The combined mass of the platform and the crate is 207 kg. If the power expended by the forklift is 1440 W, how long does it take to lift the crate? (a) 37.2 s (c) 3.87 s (e) 1.86 s (b) 5.81 s (d) 18.6 s Review Exam 2-New.doc

14 61. The amount on energy needed to power a 0.10-kW bulb for one minute would be just sufficient to lift a 1.0-kg object through a vertical distance of (a) 12 m (c) 100 m (e) 610 m (b) 75 m (d) 120 m 62. The graph shows the force component along the displacement as a function of the magnitude of the displacement. Determine the work done by the force during the interval from 2 to 10 m. (a) 140 J (b) 190 J (c) 270 J (d) 450 J (e) 560 J Review Exam 2-New.doc

15 67. A motorist driving a 1000-kg car wishes to increase her speed from 20 m/s to 30 m/s in 5 s. Determine the horsepower required to accomplish this increase. Neglect friction. (a) 20 hp (c) 70 hp (e) 90 hp (b) 30 hp (d) 80 hp Review Exam 2-New.doc

16 Physics 1401 Chapter 7N Review-New CHAPTER 6 2. A rock is dropped from a high tower and falls freely under the influence of gravity. Which one of the following statements is true concerning the rock as it falls? (a) It will gain an equal amount of momentum during each second. (b) It will gain an equal amount of kinetic energy during each second. (c) It will gain an equal amount of speed for each meter through which it falls. (d) It will gain an equal amount of momentum for each meter through which it falls. (e) The amount of momentum it gains will be proportional to the amount of potential energy that it loses A stunt person jumps from the roof of a tall building, but no injury occurs because the person lands on a large, air-filled bag. Which one of the following best describes why no injury occurs? (a) The bag provides the necessary force to stop the person. (b) The bag reduces the impulse to the person. (c) The bag increases the amount of time the force acts on the person and reduces the change in momentum. (d) The bag decreases the amount of time during which the momentum is changing and reduces the average force on the person. (e) The bag increases the amount of time during which the momentum is changing and reduces the average force on the person. 5. A 1.0-kg ball has a velocity of 12 m/s downward just before it strikes the ground and bounces up with a velocity of 12 m/s upward. What is the change in momentum of the ball? (a) zero kg m/s (c) 12 kg m/s, upward (e) 24 kg m/s, upward (b) 12 kg m/s, downward (d) 24 kg m/s, downward Review Exam 2-New.doc

17 9. A kg tennis ball moving to the right with a speed of 15 m/s is struck by a tennis racket, causing it to move to the left with a speed of 15 m/s. If the ball remains in contact with the racquet for s, what is the magnitude of the average force experienced by the ball? (a) zero newtons (c) 160 N (e) N (b) 98 N (d) N 12. While a car is stopped at a traffic light in a storm, raindrops strike the roof of the car. The area of he roof is 5.0 m 2. Each raindrop has a mass of kg and speed of 2.5 m/s before impact and is at rest after the impact. If, on average at a given time, 150 raindrops strike each square meter, what is the impulse of the rain striking the car? (a) 0.69 N s (c) 0.14 N s (e) 21 N s (b) N s (d) 11 N s 15. A football player kicks a 0.41-kg football initially at rest; and the ball flies through the air. If the kicker s foot was in contact with the ball for s and the ball s initial speed after the collision is 21 m/s, what was the magnitude of the average force on the football? (a) 9.7 N (c) 81 N (e) 210 N (b) 46 N (d) 170 N Review Exam 2-New.doc

18 Questions 16 and 17 pertain to the situation described below: A 4.0-kg block slides along a frictionless surface with a constant speed of 5.0 m/s. Two seconds after it begins sliding, a horizontal, time-dependent force is applied to the mass. The force is removed eight seconds later. The graph shows how the force on the block varies with time. 16. What is the magnitude of the total impulse of the force acting on the block? (a) 20 N s (c) 48 N s (e) 60 N s (b) 42 N s (d) 54 N s 17. What, approximately, is the speed of the block at t = 11 seconds? (a) 5.0 m/s (c) 25 m/s (e) 75 m/s (b) 16 m/s (d) 65 m/s 21. A 50-kg toboggan is coasting on level snow. As it passes beneath a bridge, a 20-kg parcel is dropped straight down and lands in the toboggan. If (KE) 1 is the original kinetic energy of the toboggan and (KE) 2 is the kinetic energy after the parcel has been added, what is the ratio (KE) 2 /(KE) 1. (a) 0.4 (c) 0.7 (e) 1 (b) 0.6 (d) 0.8 Review Exam 2-New.doc

19 Ans. c. 25. An 80-kg astronaut carrying a 20-kg tool kit is initially drifting toward a stationary space shuttle at a speed of 2 m/s. If she throws the tool kit toward the shuttle with a speed of 6 m/s as seen from the shuttle, her final speed is (a) 1 m/s toward the shuttle. (d) 4 m/s toward the shuttle. (b) 1 m/s away from the shuttle. (e) 6 m/s away from the shuttle. (c) 2 m/s toward the shuttle. 28. Two objects of equal mass traveling toward each other with equal speeds undergo a head on collision. Which one of the following statements concerning their velocities after the collision is necessarily true? (a) They will exchange velocities. (d) Their velocities will be zero. (b) Their velocities will be reduced. (e) Their velocities may be zero. (c) Their velocities will be unchanged. Review Exam 2-New.doc

20 31. Complete the following statement: Momentum will be conserved in a two-body collision only if (a) both bodies come to rest. (b) the collision is perfectly elastic. (c) the kinetic energy of the system is conserved. (d) the net external force acting on the two-body system is zero. (e) the internal forces of the two body system cancel in action-reaction pairs. 39. A 50.0-kg boy runs at a speed of 10.0 m/s and jumps onto a cart as shown in the figure. The cart is initially at rest. If the speed of the cart with the boy on it is 2.50 m/s, what is the mass of the cart? (a) 150 kg (c) 210 kg (e) 300 kg (b) 175 kg (d) 260 kg Review Exam 2-New.doc

21 42. A 35-kg girl is standing near and to the left of a 43-kg boy on the frictionless surface of a frozen pond. The boy tosses a 0.75-kg ice ball to the girl with a horizontal speed of 6.2 m/s. What are the velocities of the boy and the girl immediately after the girl catches the ice ball? girl boy (a) 0.81 m/s, left 0.67 m/s, right (b) 0.17 m/s, left 0.14 m/s, left (c) 0.18 m/s, right 0.13 m/s, left (d) 0.42 m/s, left 0.49 m/s, right (e) 0.13 m/s, left 0.11 m/s, right 50. In the game of billiards, all the balls have approximately the same mass, about 0.17 kg. In the figure, the cue ball strikes another ball such that it follows the path shown. The other ball has a speed of 1.5 m/s immediately after the collision. What is the speed of the cue ball after the collision? (a) 1.5 m/s (c) 2.6 m/s (e) 5.2 m/s (b) 1.8 m/s (d) 4.3 m/s 64. A 100-kg fisherman and a 500-kg supply crate are on a frozen pond that is essentially frictionless. The man and the crate are initially separated by a distance of 600 meters. The fisherman uses a very light rope to pull the crate closer to him. How far has the man moved when the crate reaches the fisherman? (a) zero meters (c) 50 m (e) 500 m (b) 10 m (d) 100 m Review Exam 2-New.doc

22 Physics 1401 Chapter 8 Review 2. A wrench is used to tighten a nut as shown in the figure. A 12-N force is applied 7.0 cm from the axis of rotation. What is the torque due to the applied force? (a) 0.58 N m (b) 0.84 N m (c) 1.71 N m (d) 14 N m (e) 58 N m 3. A string is tied to a doorknob 0.79 m from the hinge as shown in the figure. At the instant shown, the force applied to the string is 5.0 N. What is the torque on the door? (a) 3.3 N m (b) 2.2 N m (c) 1.1 N m (d) 0.84 N m (e) 0.40 N m Review Exam 2-New.doc

23 6. A horizontal, 10-m plank weighs 100 N. It rests on two supports that are placed 1.0 m from each end as shown in the figure. How close to one end can an 800-N person stand without causing the plank to tip? (a) 0 m (d) 0.6 m (b) 0.2 m (e) 0.8 m (c) 0.5 m 8. One end of a rope is tied to the handle of a horizontally-oriented and uniform door. A force F is applied to the other end of the rope as shown in the drawing. The door has a weight of 145 N and is hinged on the right. What is the maximum magnitude of F at which the door will remain at rest? (a) 145 N (d) 424 N (b) 265 N (e) 530 N (c) 381 N Review Exam 2-New.doc

24 In the drawing shown, the large wheel has a radius of 8.5 m. A rope is wrapped around the edge of the wheel and a 7.6 kg-box hangs from the rope. A smaller disk of radius 1.9 m is attached to the wheel. A rope is wrapped around the edge of the disk as shown. An axis of rotation passes through the center of the wheel-disk system. What is the value of the mass M that will prevent the wheel from rotating? (a) 1.7 kg (d) 34 kg (b) 3.8 kg (e) 46 kg (c) 12 kg 14. Consider four point masses located as shown in the sketch. The acceleration due to gravity is the same everywhere. What is the x coordinate of the center of gravity for this system? (a) 2.0 m (c) 3.0 m (e) 3.8 m (b) 2.7 m (d) 3.3 m Review Exam 2-New.doc

25 17. Consider the following four objects: a hoop; a solid sphere; a flat disk; a hollow sphere Each of the objects has mass M and radius R. The axis of rotation passes through the center of each object, and is perpendicular to the plane of the hoop and the plane of the flat disk. Which object requires the largest torque to give it the same angular acceleration? (a) the hoop (d) the hollow sphere (b) the flat disk (e) both the solid and the hollow spheres (c) the solid sphere 20. A massless frame in the shape of a square with 2-m sides has a 1-kg ball at each corner. What is the moment of inertia of the four balls about an axis through the corner marked O and perpendicular to the plane of the paper? (a) 4 kg m 2 (b) 8 kg m 2 (c) 10 kg m 2 (d) 12 kg m 2 (e) 16 kg m 2 Review Exam 2-New.doc

26 22. The drawing shows the top view of a door that is 2 m wide. Two forces are applied to the door as indicated. What is the magnitude of the net torque on the door with respect to the hinge? (a) 0 N m (c) 8.7 N m (e) 26.0 N m (b) 5.0 N m (d) 10.0 N m 26. Three children are pulling on a rotatable platform on a playground. The platform has a radius of 3.65 m. In the picture, two children are pulling with equal forces of 40.0 N in an attempt to make the platform rotate clockwise. The third child applies a force of 60 N as shown. What is the net torque on the platform? Note: ccw is counterclockwise and cw is clockwise. (a) 73 N m, ccw (c) 511 N m, ccw (e) 0 N m (b) 73 N m, cw (d) 511 N m, cw Review Exam 2-New.doc

27 28. A 45-N brick is suspended by a light string from a 2.0-kg pulley. The brick is released from rest and falls to the floor below as the pulley rotates through 5.0 rad. The pulley may be considered a solid disk of radius 1.5 m. What is the angular speed of the pulley? (a) 7.3 rad/s (d) 15 rad/s (b) 8.1 rad/s (e) 17 rad/s (c) 9.4 rad/s 31. Consider the following three objects, each of the same mass and radius: (1) a solid sphere (2) a solid disk (3) a hoop All three are released from rest at the top of an inclined plane. The three objects proceed down the incline undergoing rolling motion without slipping. In which order do the objects reach the bottom of the incline? (a) 1, 2, 3 (c) 3, 1, 2 (e) All three reach the bottom (b) 2, 3, 1 (d) 3, 2, 1 at the same time. 34. A 2.0-kg solid cylinder of radius 0.5 m rotates at a rate of 40 rad/s about its cylindrical axis. What power is required to bring the cylinder to rest in 10 s? (a) 20 W (c) 160 W (e) 400 W (b) 40 W (d) 200 W Review Exam 2-New.doc

28 38. A ceiling fan has five blades, each with a mass of 0.34 kg and a length of 0.66 m. The fan is operating in its low setting at which the angular speed is 9.4 rad/s. If the blades can be approximated as uniform thin rods that rotate about one end, what is the total rotational kinetic energy of the five blades? (a) 35 J (c) 23 J (e) 11 J (b) 29 J (d) 17 J 41. What happens when a spinning ice skater draws in her outstretched arms? (a) Her angular momentum decreases. (b) Her angular momentum increases. (c) Her moment of inertia decreases causing her to speed up. (d) Her moment of inertia decreases causing her to slow down. (e) The torque that she exerts increases her moment of inertia. 44. A 1500-kg satellite orbits a planet in a circular orbit of radius m. What is the angular momentum of the satellite in its orbit around the planet if the satellite completes one orbit every s? (a) kg m 2 /s (c) kg m 2 /s (e) kg m 2 /s (b) kg m 2 /s (d) kg m 2 /s Review Exam 2-New.doc

29 50. A 3.0-kg ball moves in a straight line at 10 m/s as shown in the figure. At the instant shown, what is its angular momentum about the point P? (a) 30 kg m 2 /s (b) 90 kg m 2 /s (c) 120 kg m 2 /s (d) 150 kg m 2 /s (e) zero kg m 2 /s Review Exam 2-New.doc

PHY231 Section 2, Form A March 22, 2012. 1. Which one of the following statements concerning kinetic energy is true?

PHY231 Section 2, Form A March 22, 2012. 1. Which one of the following statements concerning kinetic energy is true? 1. Which one of the following statements concerning kinetic energy is true? A) Kinetic energy can be measured in watts. B) Kinetic energy is always equal to the potential energy. C) Kinetic energy is always

More information

PHY231 Section 1, Form B March 22, 2012

PHY231 Section 1, Form B March 22, 2012 1. A car enters a horizontal, curved roadbed of radius 50 m. The coefficient of static friction between the tires and the roadbed is 0.20. What is the maximum speed with which the car can safely negotiate

More information

F N A) 330 N 0.31 B) 310 N 0.33 C) 250 N 0.27 D) 290 N 0.30 E) 370 N 0.26

F N A) 330 N 0.31 B) 310 N 0.33 C) 250 N 0.27 D) 290 N 0.30 E) 370 N 0.26 Physics 23 Exam 2 Spring 2010 Dr. Alward Page 1 1. A 250-N force is directed horizontally as shown to push a 29-kg box up an inclined plane at a constant speed. Determine the magnitude of the normal force,

More information

Physics 2A, Sec B00: Mechanics -- Winter 2011 Instructor: B. Grinstein Final Exam

Physics 2A, Sec B00: Mechanics -- Winter 2011 Instructor: B. Grinstein Final Exam Physics 2A, Sec B00: Mechanics -- Winter 2011 Instructor: B. Grinstein Final Exam INSTRUCTIONS: Use a pencil #2 to fill your scantron. Write your code number and bubble it in under "EXAM NUMBER;" an entry

More information

Physics 125 Practice Exam #3 Chapters 6-7 Professor Siegel

Physics 125 Practice Exam #3 Chapters 6-7 Professor Siegel Physics 125 Practice Exam #3 Chapters 6-7 Professor Siegel Name: Lab Day: 1. A concrete block is pulled 7.0 m across a frictionless surface by means of a rope. The tension in the rope is 40 N; and the

More information

Differentiated Physics Practice Questions

Differentiated Physics Practice Questions Differentiated Physics Practice Questions Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A 100-kg cannon at rest contains a 10-kg cannon ball. When fired,

More information

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Exam Name SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) A lawn roller in the form of a uniform solid cylinder is being pulled horizontally by a horizontal

More information

Assignment Work (Physics) Class :Xi Chapter :04: Motion In PLANE

Assignment Work (Physics) Class :Xi Chapter :04: Motion In PLANE 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Assignment Work (Physics) Class :Xi Chapter :04: Motion In PLANE State law of parallelogram of vector addition and derive expression for resultant of two vectors

More information

9. The kinetic energy of the moving object is (1) 5 J (3) 15 J (2) 10 J (4) 50 J

9. The kinetic energy of the moving object is (1) 5 J (3) 15 J (2) 10 J (4) 50 J 1. If the kinetic energy of an object is 16 joules when its speed is 4.0 meters per second, then the mass of the objects is (1) 0.5 kg (3) 8.0 kg (2) 2.0 kg (4) 19.6 kg Base your answers to questions 9

More information

PHY121 #8 Midterm I 3.06.2013

PHY121 #8 Midterm I 3.06.2013 PHY11 #8 Midterm I 3.06.013 AP Physics- Newton s Laws AP Exam Multiple Choice Questions #1 #4 1. When the frictionless system shown above is accelerated by an applied force of magnitude F, the tension

More information

Physics Midterm Review. Multiple-Choice Questions

Physics Midterm Review. Multiple-Choice Questions Physics Midterm Review Multiple-Choice Questions 1. A train moves at a constant velocity of 90 km/h. How far will it move in 0.25 h? A. 10 km B. 22.5 km C. 25 km D. 45 km E. 50 km 2. A bicyclist moves

More information

AP Physics C Fall Final Web Review

AP Physics C Fall Final Web Review Name: Class: _ Date: _ AP Physics C Fall Final Web Review Multiple Choice Identify the choice that best completes the statement or answers the question. 1. On a position versus time graph, the slope of

More information

PSI AP Physics I Rotational Motion

PSI AP Physics I Rotational Motion PSI AP Physics I Rotational Motion Multiple-Choice questions 1. Which of the following is the unit for angular displacement? A. meters B. seconds C. radians D. radians per second 2. An object moves from

More information

1) 0.33 m/s 2. 2) 2 m/s 2. 3) 6 m/s 2. 4) 18 m/s 2 1) 120 J 2) 40 J 3) 30 J 4) 12 J. 1) unchanged. 2) halved. 3) doubled.

1) 0.33 m/s 2. 2) 2 m/s 2. 3) 6 m/s 2. 4) 18 m/s 2 1) 120 J 2) 40 J 3) 30 J 4) 12 J. 1) unchanged. 2) halved. 3) doubled. Base your answers to questions 1 through 5 on the diagram below which represents a 3.0-kilogram mass being moved at a constant speed by a force of 6.0 Newtons. 4. If the surface were frictionless, the

More information

C B A T 3 T 2 T 1. 1. What is the magnitude of the force T 1? A) 37.5 N B) 75.0 N C) 113 N D) 157 N E) 192 N

C B A T 3 T 2 T 1. 1. What is the magnitude of the force T 1? A) 37.5 N B) 75.0 N C) 113 N D) 157 N E) 192 N Three boxes are connected by massless strings and are resting on a frictionless table. Each box has a mass of 15 kg, and the tension T 1 in the right string is accelerating the boxes to the right at a

More information

2. (P2.1 A) a) A car travels 150 km in 3 hours, what is the cars average speed?

2. (P2.1 A) a) A car travels 150 km in 3 hours, what is the cars average speed? Physics: Review for Final Exam 1 st Semester Name Hour P2.1A Calculate the average speed of an object using the change of position and elapsed time 1. (P2.1 A) What is your average speed if you run 140

More information

Linear Centripetal Tangential speed acceleration acceleration A) Rω Rω 2 Rα B) Rω Rα Rω 2 C) Rω 2 Rα Rω D) Rω Rω 2 Rω E) Rω 2 Rα Rω 2 Ans: A

Linear Centripetal Tangential speed acceleration acceleration A) Rω Rω 2 Rα B) Rω Rα Rω 2 C) Rω 2 Rα Rω D) Rω Rω 2 Rω E) Rω 2 Rα Rω 2 Ans: A 1. Two points, A and B, are on a disk that rotates about an axis. Point A is closer to the axis than point B. Which of the following is not true? A) Point B has the greater speed. B) Point A has the lesser

More information

10.1 Quantitative. Answer: A Var: 50+

10.1 Quantitative. Answer: A Var: 50+ Chapter 10 Energy and Work 10.1 Quantitative 1) A child does 350 J of work while pulling a box from the ground up to his tree house with a rope. The tree house is 4.8 m above the ground. What is the mass

More information

B) 40.8 m C) 19.6 m D) None of the other choices is correct. Answer: B

B) 40.8 m C) 19.6 m D) None of the other choices is correct. Answer: B Practice Test 1 1) Abby throws a ball straight up and times it. She sees that the ball goes by the top of a flagpole after 0.60 s and reaches the level of the top of the pole after a total elapsed time

More information

Chapter 5 Using Newton s Laws: Friction, Circular Motion, Drag Forces. Copyright 2009 Pearson Education, Inc.

Chapter 5 Using Newton s Laws: Friction, Circular Motion, Drag Forces. Copyright 2009 Pearson Education, Inc. Chapter 5 Using Newton s Laws: Friction, Circular Motion, Drag Forces Units of Chapter 5 Applications of Newton s Laws Involving Friction Uniform Circular Motion Kinematics Dynamics of Uniform Circular

More information

Work, Energy & Momentum Homework Packet Worksheet 1: This is a lot of work!

Work, Energy & Momentum Homework Packet Worksheet 1: This is a lot of work! Work, Energy & Momentum Homework Packet Worksheet 1: This is a lot of work! 1. A student holds her 1.5-kg psychology textbook out of a second floor classroom window until her arm is tired; then she releases

More information

PHYSICS MIDTERM REVIEW

PHYSICS MIDTERM REVIEW 1. The acceleration due to gravity on the surface of planet X is 19.6 m/s 2. If an object on the surface of this planet weighs 980. newtons, the mass of the object is 50.0 kg 490. N 100. kg 908 N 2. If

More information

Physics Exam 1 Review - Chapter 1,2

Physics Exam 1 Review - Chapter 1,2 Physics 1401 - Exam 1 Review - Chapter 1,2 13. Which of the following is NOT one of the fundamental units in the SI system? A) newton B) meter C) kilogram D) second E) All of the above are fundamental

More information

B) 286 m C) 325 m D) 367 m Answer: B

B) 286 m C) 325 m D) 367 m Answer: B Practice Midterm 1 1) When a parachutist jumps from an airplane, he eventually reaches a constant speed, called the terminal velocity. This means that A) the acceleration is equal to g. B) the force of

More information

Explaining Motion:Forces

Explaining Motion:Forces Explaining Motion:Forces Chapter Overview (Fall 2002) A. Newton s Laws of Motion B. Free Body Diagrams C. Analyzing the Forces and Resulting Motion D. Fundamental Forces E. Macroscopic Forces F. Application

More information

1. Newton s Laws of Motion and their Applications Tutorial 1

1. Newton s Laws of Motion and their Applications Tutorial 1 1. Newton s Laws of Motion and their Applications Tutorial 1 1.1 On a planet far, far away, an astronaut picks up a rock. The rock has a mass of 5.00 kg, and on this particular planet its weight is 40.0

More information

Physics 271 FINAL EXAM-SOLUTIONS Friday Dec 23, 2005 Prof. Amitabh Lath

Physics 271 FINAL EXAM-SOLUTIONS Friday Dec 23, 2005 Prof. Amitabh Lath Physics 271 FINAL EXAM-SOLUTIONS Friday Dec 23, 2005 Prof. Amitabh Lath 1. The exam will last from 8:00 am to 11:00 am. Use a # 2 pencil to make entries on the answer sheet. Enter the following id information

More information

Unit 4 Practice Test: Rotational Motion

Unit 4 Practice Test: Rotational Motion Unit 4 Practice Test: Rotational Motion Multiple Guess Identify the letter of the choice that best completes the statement or answers the question. 1. How would an angle in radians be converted to an angle

More information

Chapter 7: Momentum and Impulse

Chapter 7: Momentum and Impulse Chapter 7: Momentum and Impulse 1. When a baseball bat hits the ball, the impulse delivered to the ball is increased by A. follow through on the swing. B. rapidly stopping the bat after impact. C. letting

More information

Units DEMO spring scales masses

Units DEMO spring scales masses Dynamics the study of the causes and changes of motion Force Force Categories ContactField 4 fundamental Force Types 1 Gravity 2 Weak Nuclear Force 3 Electromagnetic 4 Strong Nuclear Force Units DEMO spring

More information

ROLLING, TORQUE, AND ANGULAR MOMENTUM

ROLLING, TORQUE, AND ANGULAR MOMENTUM Chapter 11: ROLLING, TORQUE, AND ANGULAR MOMENTUM 1 A wheel rolls without sliding along a horizontal road as shown The velocity of the center of the wheel is represented by! Point P is painted on the rim

More information

1) The gure below shows the position of a particle (moving along a straight line) as a function of time. Which of the following statements is true?

1) The gure below shows the position of a particle (moving along a straight line) as a function of time. Which of the following statements is true? Physics 2A, Sec C00: Mechanics -- Winter 2011 Instructor: B. Grinstein Final Exam INSTRUCTIONS: Use a pencil #2 to ll your scantron. Write your code number and bubble it in under "EXAM NUMBER;" an entry

More information

PHYS 211 FINAL FALL 2004 Form A

PHYS 211 FINAL FALL 2004 Form A 1. Two boys with masses of 40 kg and 60 kg are holding onto either end of a 10 m long massless pole which is initially at rest and floating in still water. They pull themselves along the pole toward each

More information

Physics 201 Homework 5

Physics 201 Homework 5 Physics 201 Homework 5 Feb 6, 2013 1. The (non-conservative) force propelling a 1500-kilogram car up a mountain -1.21 10 6 joules road does 4.70 10 6 joules of work on the car. The car starts from rest

More information

Conceptual Questions: Forces and Newton s Laws

Conceptual Questions: Forces and Newton s Laws Conceptual Questions: Forces and Newton s Laws 1. An object can have motion only if a net force acts on it. his statement is a. true b. false 2. And the reason for this (refer to previous question) is

More information

Work, Energy and Power Practice Test 1

Work, Energy and Power Practice Test 1 Name: ate: 1. How much work is required to lift a 2-kilogram mass to a height of 10 meters?. 5 joules. 20 joules. 100 joules. 200 joules 5. ar and car of equal mass travel up a hill. ar moves up the hill

More information

Exam 1 Review Questions PHY 2425 - Exam 1

Exam 1 Review Questions PHY 2425 - Exam 1 Exam 1 Review Questions PHY 2425 - Exam 1 Exam 1H Rev Ques.doc - 1 - Section: 1 7 Topic: General Properties of Vectors Type: Conceptual 1 Given vector A, the vector 3 A A) has a magnitude 3 times that

More information

Rotational Mechanics - 1

Rotational Mechanics - 1 Rotational Mechanics - 1 The Radian The radian is a unit of angular measure. The radian can be defined as the arc length s along a circle divided by the radius r. s r Comparing degrees and radians 360

More information

Physics 2101, First Exam, Fall 2007

Physics 2101, First Exam, Fall 2007 Physics 2101, First Exam, Fall 2007 September 4, 2007 Please turn OFF your cell phone and MP3 player! Write down your name and section number in the scantron form. Make sure to mark your answers in the

More information

ANSWER KEY. Reviewing Physics: The Physical Setting THIRD EDITION. Amsco School Publications, Inc. 315 Hudson Street / New York, N.Y.

ANSWER KEY. Reviewing Physics: The Physical Setting THIRD EDITION. Amsco School Publications, Inc. 315 Hudson Street / New York, N.Y. NSWER KEY Reviewing Physics: The Physical Setting THIRD EDITION msco School Publications, Inc. 315 Hudson Street / New York, N.Y. 10013 N 7310 CD Manufactured in the United States of merica 1345678910

More information

2.1 Force and Motion Kinematics looks at velocity and acceleration without reference to the cause of the acceleration.

2.1 Force and Motion Kinematics looks at velocity and acceleration without reference to the cause of the acceleration. 2.1 Force and Motion Kinematics looks at velocity and acceleration without reference to the cause of the acceleration. Dynamics looks at the cause of acceleration: an unbalanced force. Isaac Newton was

More information

CHAPTER 6 WORK AND ENERGY

CHAPTER 6 WORK AND ENERGY CHAPTER 6 WORK AND ENERGY CONCEPTUAL QUESTIONS. REASONING AND SOLUTION The work done by F in moving the box through a displacement s is W = ( F cos 0 ) s= Fs. The work done by F is W = ( F cos θ). s From

More information

NEWTON S LAWS OF MOTION

NEWTON S LAWS OF MOTION NEWTON S LAWS OF MOTION Background: Aristotle believed that the natural state of motion for objects on the earth was one of rest. In other words, objects needed a force to be kept in motion. Galileo studied

More information

Center of Mass/Momentum

Center of Mass/Momentum Center of Mass/Momentum 1. 2. An L-shaped piece, represented by the shaded area on the figure, is cut from a metal plate of uniform thickness. The point that corresponds to the center of mass of the L-shaped

More information

1. A radian is about: A. 25 ± B. 37 ± C. 45 ± D. 57 ± E. 90 ± ans: D Section: 10{2; Di±culty: E

1. A radian is about: A. 25 ± B. 37 ± C. 45 ± D. 57 ± E. 90 ± ans: D Section: 10{2; Di±culty: E Chapter 10: ROTATION 1 A radian is about: A 25 ± B 37 ± C 45 ± D 57 ± E 90 ± Section: 10{2; Di±culty: E 2 One revolution is the same as: A 1 rad B 57 rad C ¼=2rad D ¼ rad E 2¼ rad Section: 10{2; Di±culty:

More information

Physics Honors Page 1

Physics Honors Page 1 1. An ideal standard of measurement should be. variable, but not accessible variable and accessible accessible, but not variable neither variable nor accessible 2. The approximate height of a 12-ounce

More information

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The following four forces act on a 4.00 kg object: 1) F 1 = 300 N east F 2 = 700 N north

More information

HW Set VI page 1 of 9 PHYSICS 1401 (1) homework solutions

HW Set VI page 1 of 9 PHYSICS 1401 (1) homework solutions HW Set VI page 1 of 9 10-30 A 10 g bullet moving directly upward at 1000 m/s strikes and passes through the center of mass of a 5.0 kg block initially at rest (Fig. 10-33 ). The bullet emerges from the

More information

Understanding the motion of the Universe. Motion, Force, and Gravity

Understanding the motion of the Universe. Motion, Force, and Gravity Understanding the motion of the Universe Motion, Force, and Gravity Laws of Motion Stationary objects do not begin moving on their own. In the same way, moving objects don t change their movement spontaneously.

More information

If something is spinning, it moves more quickly if it. d is farther from the center of rotation. For instance, θ

If something is spinning, it moves more quickly if it. d is farther from the center of rotation. For instance, θ The Big Idea The third conservation law is conservation of angular momentum. This can be roughly understood as spin, more accurately it is rotational velocity multiplied by rotational inertia. In any closed

More information

Review Chapters 2, 3, 4, 5

Review Chapters 2, 3, 4, 5 Review Chapters 2, 3, 4, 5 4) The gain in speed each second for a freely-falling object is about A) 0. B) 5 m/s. C) 10 m/s. D) 20 m/s. E) depends on the initial speed 9) Whirl a rock at the end of a string

More information

Physics-1 Recitation-3

Physics-1 Recitation-3 Physics-1 Recitation-3 The Laws of Motion 1) The displacement of a 2 kg particle is given by x = At 3/2. In here, A is 6.0 m/s 3/2. Find the net force acting on the particle. (Note that the force is time

More information

IMPORTANT NOTE ABOUT WEBASSIGN:

IMPORTANT NOTE ABOUT WEBASSIGN: Week 8 homework IMPORTANT NOTE ABOUT WEBASSIGN: In the WebAssign versions of these problems, various details have been changed, so that the answers will come out differently. The method to find the solution

More information

Physics: Principles and Applications, 6e Giancoli Chapter 4 Dynamics: Newton's Laws of Motion

Physics: Principles and Applications, 6e Giancoli Chapter 4 Dynamics: Newton's Laws of Motion Physics: Principles and Applications, 6e Giancoli Chapter 4 Dynamics: Newton's Laws of Motion Conceptual Questions 1) Which of Newton's laws best explains why motorists should buckle-up? A) the first law

More information

Linear and Rotational Kinematics

Linear and Rotational Kinematics Linear and Rotational Kinematics Starting from rest, a disk takes 10 revolutions to reach an angular velocity. If the angular acceleration is constant throughout, how many additional revolutions are required

More information

Rotational Dynamics. Luis Anchordoqui

Rotational Dynamics. Luis Anchordoqui Rotational Dynamics Angular Quantities In purely rotational motion, all points on the object move in circles around the axis of rotation ( O ). The radius of the circle is r. All points on a straight line

More information

Section Review Answers. Chapter 12

Section Review Answers. Chapter 12 Section Review Answers Chapter 12 Section 1 1. Answers may vary. Students should say in their own words that an object at rest remains at rest and an object in motion maintains its velocity unless it experiences

More information

Exam Review Tuesday, September 17, Chapter 2: Kinematics in One Dimension

Exam Review Tuesday, September 17, Chapter 2: Kinematics in One Dimension Exam Review Tuesday, September 17, 2013 10:00 PM Chapter 2: Kinematics in One Dimension Example: A juggler throws a ball straight up with an initial speed of 10 m/s. With what speed would she need to throw

More information

PHYS 117- Exam I. Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.

PHYS 117- Exam I. Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. PHYS 117- Exam I Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Car A travels from milepost 343 to milepost 349 in 5 minutes. Car B travels

More information

Exam 3 Review Questions PHY Exam 3

Exam 3 Review Questions PHY Exam 3 Exam 3 Review Questions PHY 2425 - Exam 3 Section: 8 1 Topic: Conservation of Linear Momentum Type: Numerical 1 An automobile of mass 1300 kg has an initial velocity of 7.20 m/s toward the north and a

More information

AP Physics 1 Midterm Exam Review

AP Physics 1 Midterm Exam Review AP Physics 1 Midterm Exam Review 1. The graph above shows the velocity v as a function of time t for an object moving in a straight line. Which of the following graphs shows the corresponding displacement

More information

Version PREVIEW Practice 8 carroll (11108) 1

Version PREVIEW Practice 8 carroll (11108) 1 Version PREVIEW Practice 8 carroll 11108 1 This print-out should have 12 questions. Multiple-choice questions may continue on the net column or page find all choices before answering. Inertia of Solids

More information

2. A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed? a. 3.2 rad/s c. 52 rad/s b. 26 rad/s d.

2. A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed? a. 3.2 rad/s c. 52 rad/s b. 26 rad/s d. Rotational Motion 1. 2 600 rev/min is equivalent to which of the following? a. 2600 rad/s c. 273 rad/s b. 43.3 rad/s d. 60 rad/s 2. A grindstone spinning at the rate of 8.3 rev/s has what approximate angular

More information

6: Applications of Newton's Laws

6: Applications of Newton's Laws 6: Applications of Newton's Laws Friction opposes motion due to surfaces sticking together Kinetic Friction: surfaces are moving relative to each other a.k.a. Sliding Friction Static Friction: surfaces

More information

AP Physics - Chapter 8 Practice Test

AP Physics - Chapter 8 Practice Test AP Physics - Chapter 8 Practice Test Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A single conservative force F x = (6.0x 12) N (x is in m) acts on

More information

5. Forces and Motion-I. Force is an interaction that causes the acceleration of a body. A vector quantity.

5. Forces and Motion-I. Force is an interaction that causes the acceleration of a body. A vector quantity. 5. Forces and Motion-I 1 Force is an interaction that causes the acceleration of a body. A vector quantity. Newton's First Law: Consider a body on which no net force acts. If the body is at rest, it will

More information

Phys 111 Fall P111 Syllabus

Phys 111 Fall P111 Syllabus Phys 111 Fall 2012 Course structure Five sections lecture time 150 minutes per week Textbook Physics by James S. Walker fourth edition (Pearson) Clickers recommended Coursework Complete assignments from

More information

Physics term 1 reviewsheet

Physics term 1 reviewsheet Name: ate: 1. The length of line shown is closest to one. millimeter. centimeter. meter. kilometer 5. The diagram shown represents a rectangle composed of squares with sides one meter long. What is the

More information

Chapter 3.8 & 6 Solutions

Chapter 3.8 & 6 Solutions Chapter 3.8 & 6 Solutions P3.37. Prepare: We are asked to find period, speed and acceleration. Period and frequency are inverses according to Equation 3.26. To find speed we need to know the distance traveled

More information

Chapter 4 Dynamics: Newton s Laws of Motion

Chapter 4 Dynamics: Newton s Laws of Motion Chapter 4 Dynamics: Newton s Laws of Motion Units of Chapter 4 Force Newton s First Law of Motion Mass Newton s Second Law of Motion Newton s Third Law of Motion Weight the Force of Gravity; and the Normal

More information

9 ROTATIONAL DYNAMICS

9 ROTATIONAL DYNAMICS CHAPTER 9 ROTATIONAL DYNAMICS CONCEPTUAL QUESTIONS 1. REASONING AND SOLUTION The magnitude of the torque produced by a force F is given by τ = Fl, where l is the lever arm. When a long pipe is slipped

More information

Physics 1A Lecture 10C

Physics 1A Lecture 10C Physics 1A Lecture 10C "If you neglect to recharge a battery, it dies. And if you run full speed ahead without stopping for water, you lose momentum to finish the race. --Oprah Winfrey Static Equilibrium

More information

Lesson 5 Rotational and Projectile Motion

Lesson 5 Rotational and Projectile Motion Lesson 5 Rotational and Projectile Motion Introduction: Connecting Your Learning The previous lesson discussed momentum and energy. This lesson explores rotational and circular motion as well as the particular

More information

Chapter 4: Newton s Laws: Explaining Motion

Chapter 4: Newton s Laws: Explaining Motion Chapter 4: Newton s Laws: Explaining Motion 1. All except one of the following require the application of a net force. Which one is the exception? A. to change an object from a state of rest to a state

More information

Midterm Solutions. mvr = ω f (I wheel + I bullet ) = ω f 2 MR2 + mr 2 ) ω f = v R. 1 + M 2m

Midterm Solutions. mvr = ω f (I wheel + I bullet ) = ω f 2 MR2 + mr 2 ) ω f = v R. 1 + M 2m Midterm Solutions I) A bullet of mass m moving at horizontal velocity v strikes and sticks to the rim of a wheel a solid disc) of mass M, radius R, anchored at its center but free to rotate i) Which of

More information

356 CHAPTER 12 Bob Daemmrich

356 CHAPTER 12 Bob Daemmrich Standard 7.3.17: Investigate that an unbalanced force, acting on an object, changes its speed or path of motion or both, and know that if the force always acts toward the same center as the object moves,

More information

Concept Review. Physics 1

Concept Review. Physics 1 Concept Review Physics 1 Speed and Velocity Speed is a measure of how much distance is covered divided by the time it takes. Sometimes it is referred to as the rate of motion. Common units for speed or

More information

Angular velocity. Angular velocity measures how quickly the object is rotating. Average angular velocity. Instantaneous angular velocity

Angular velocity. Angular velocity measures how quickly the object is rotating. Average angular velocity. Instantaneous angular velocity Angular velocity Angular velocity measures how quickly the object is rotating. Average angular velocity Instantaneous angular velocity Two coins rotate on a turntable. Coin B is twice as far from the axis

More information

KEY NNHS Introductory Physics: MCAS Review Packet #1 Introductory Physics, High School Learning Standards for a Full First-Year Course

KEY NNHS Introductory Physics: MCAS Review Packet #1 Introductory Physics, High School Learning Standards for a Full First-Year Course Introductory Physics, High School Learning Standards for a Full First-Year Course I. C O N T E N T S T A N D A R D S Central Concept: Newton s laws of motion and gravitation describe and predict the motion

More information

BHS Freshman Physics Review. Chapter 2 Linear Motion Physics is the oldest science (astronomy) and the foundation for every other science.

BHS Freshman Physics Review. Chapter 2 Linear Motion Physics is the oldest science (astronomy) and the foundation for every other science. BHS Freshman Physics Review Chapter 2 Linear Motion Physics is the oldest science (astronomy) and the foundation for every other science. Galileo (1564-1642): 1 st true scientist and 1 st person to use

More information

AN ROINN OIDEACHAIS AGUS EOLAÍOCHTA LEAVING CERTIFICATE EXAMINATION, 2001 APPLIED MATHEMATICS HIGHER LEVEL

AN ROINN OIDEACHAIS AGUS EOLAÍOCHTA LEAVING CERTIFICATE EXAMINATION, 2001 APPLIED MATHEMATICS HIGHER LEVEL M3 AN ROINN OIDEACHAIS AGUS EOLAÍOCHTA LEAVING CERTIFICATE EXAMINATION, 00 APPLIED MATHEMATICS HIGHER LEVEL FRIDAY, JUNE AFTERNOON,.00 to 4.30 Six questions to be answered. All questions carry equal marks.

More information

Physics 201 Fall 2009 Exam 2 October 27, 2009

Physics 201 Fall 2009 Exam 2 October 27, 2009 Physics 201 Fall 2009 Exam 2 October 27, 2009 Section #: TA: 1. A mass m is traveling at an initial speed v 0 = 25.0 m/s. It is brought to rest in a distance of 62.5 m by a force of 15.0 N. The mass is

More information

Physics 201 Homework 8

Physics 201 Homework 8 Physics 201 Homework 8 Feb 27, 2013 1. A ceiling fan is turned on and a net torque of 1.8 N-m is applied to the blades. 8.2 rad/s 2 The blades have a total moment of inertia of 0.22 kg-m 2. What is the

More information

8. As a cart travels around a horizontal circular track, the cart must undergo a change in (1) velocity (3) speed (2) inertia (4) weight

8. As a cart travels around a horizontal circular track, the cart must undergo a change in (1) velocity (3) speed (2) inertia (4) weight 1. What is the average speed of an object that travels 6.00 meters north in 2.00 seconds and then travels 3.00 meters east in 1.00 second? 9.00 m/s 3.00 m/s 0.333 m/s 4.24 m/s 2. What is the distance traveled

More information

circular motion & gravitation physics 111N

circular motion & gravitation physics 111N circular motion & gravitation physics 111N uniform circular motion an object moving around a circle at a constant rate must have an acceleration always perpendicular to the velocity (else the speed would

More information

Physics-1 Recitation-7

Physics-1 Recitation-7 Physics-1 Recitation-7 Rotation of a Rigid Object About a Fixed Axis 1. The angular position of a point on a wheel is described by. a) Determine angular position, angular speed, and angular acceleration

More information

Mid-Year Review (2) (3) (4) (1) 1 m/s (3) 0.5 m/s (2) 2 m/s (4) 0 m/s

Mid-Year Review (2) (3) (4) (1) 1 m/s (3) 0.5 m/s (2) 2 m/s (4) 0 m/s 1. A blinking light of constant period is situated on a lab cart. Which diagram best represents a photograph of the light as the cart moves with constant velocity? (1) 6. The graph below represents the

More information

No Brain Too Small PHYSICS. 2 kg

No Brain Too Small PHYSICS. 2 kg MECHANICS: ANGULAR MECHANICS QUESTIONS ROTATIONAL MOTION (2014;1) Universal gravitational constant = 6.67 10 11 N m 2 kg 2 (a) The radius of the Sun is 6.96 10 8 m. The equator of the Sun rotates at a

More information

Momentum and Energy. Ron Robertson

Momentum and Energy. Ron Robertson Momentum and Energy Ron Robertson Momentum Momentum is inertia in motion. Momentum = mass x velocity Unit kg meters/second Momentum is changed by force. The amount of momentum change is also affected by

More information

Curso2012-2013 Física Básica Experimental I Cuestiones Tema IV. Trabajo y energía.

Curso2012-2013 Física Básica Experimental I Cuestiones Tema IV. Trabajo y energía. 1. A body of mass m slides a distance d along a horizontal surface. How much work is done by gravity? A) mgd B) zero C) mgd D) One cannot tell from the given information. E) None of these is correct. 2.

More information

PSI AP Physics B Kinematics Multiple-Choice Questions

PSI AP Physics B Kinematics Multiple-Choice Questions PSI AP Physics B Kinematics Multiple-Choice Questions 1. An object moves around a circular path of radius R. The object starts from point A, goes to point B and describes an arc of half of the circle.

More information

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Vector A has length 4 units and directed to the north. Vector B has length 9 units and is directed

More information

What is a force? Identifying forces. What is the connection between force and motion? How are forces related when two objects interact?

What is a force? Identifying forces. What is the connection between force and motion? How are forces related when two objects interact? Chapter 4: Forces What is a force? Identifying forces. What is the connection between force and motion? How are forces related when two objects interact? Application different forces (field forces, contact

More information

KE =? v o. Page 1 of 12

KE =? v o. Page 1 of 12 Page 1 of 12 CTEnergy-1. A mass m is at the end of light (massless) rod of length R, the other end of which has a frictionless pivot so the rod can swing in a vertical plane. The rod is initially horizontal

More information

Chapter 10 Rotational Motion. Copyright 2009 Pearson Education, Inc.

Chapter 10 Rotational Motion. Copyright 2009 Pearson Education, Inc. Chapter 10 Rotational Motion Angular Quantities Units of Chapter 10 Vector Nature of Angular Quantities Constant Angular Acceleration Torque Rotational Dynamics; Torque and Rotational Inertia Solving Problems

More information

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Exam Name SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) A person on a sled coasts down a hill and then goes over a slight rise with speed 2.7 m/s.

More information

CHAPTER 15 FORCE, MASS AND ACCELERATION

CHAPTER 15 FORCE, MASS AND ACCELERATION CHAPTER 5 FORCE, MASS AND ACCELERATION EXERCISE 83, Page 9. A car initially at rest accelerates uniformly to a speed of 55 km/h in 4 s. Determine the accelerating force required if the mass of the car

More information

2.2 NEWTON S LAWS OF MOTION

2.2 NEWTON S LAWS OF MOTION 2.2 NEWTON S LAWS OF MOTION Sir Isaac Newton (1642-1727) made a systematic study of motion and extended the ideas of Galileo (1564-1642). He summed up Galileo s observation in his three laws of motion

More information

Practice Exam Three Solutions

Practice Exam Three Solutions MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Physics Physics 8.01T Fall Term 2004 Practice Exam Three Solutions Problem 1a) (5 points) Collisions and Center of Mass Reference Frame In the lab frame,

More information

Chapter 4 Dynamics: Newton s Laws of Motion. Copyright 2009 Pearson Education, Inc.

Chapter 4 Dynamics: Newton s Laws of Motion. Copyright 2009 Pearson Education, Inc. Chapter 4 Dynamics: Newton s Laws of Motion Force Units of Chapter 4 Newton s First Law of Motion Mass Newton s Second Law of Motion Newton s Third Law of Motion Weight the Force of Gravity; and the Normal

More information