DYNAMICS OF UNIFORM CIRCULAR MOTION

Size: px
Start display at page:

Download "DYNAMICS OF UNIFORM CIRCULAR MOTION"

Transcription

1 chapter DYNAMICS OF UNIFORM CIRCULAR MOTION Section 5.1 Uniform Circular Motion Section 5.2 Centripetal Acceleration 1. A ball moves with a constant speed of 4 m/s around a circle of radius 0.25 m. What is the period of the motion? (a) 0.1 s (c) 0.7 s (e) 2 s (b) 0.4 s (d) 1 s 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 racecar is traveling at constant speed around a circular track. What happens to the centripetal acceleration of the car if the speed is doubled? (a) The centripetal acceleration remains the same. (b) The centripetal acceleration increases by a factor of 2. (c) The centripetal acceleration increases by a factor of 4. (d) The centripetal acceleration is decreased by a factor of one-half. (e) The centripetal acceleration is decreased by a factor of one-fourth 5. A ball is whirled on the end of a string in a horizontal circle of radius R at constant speed v. Complete the following statement: 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 rock is whirled on the end of a string in a horizontal circle of radius R with a constant period T. If the radius of the circle is reduced to R/2, while the period remains T, what happens to the centripetal acceleration of the rock? (a) The centripetal acceleration remains the same. (b) The centripetal acceleration increases by a factor of 2. (c) The centripetal acceleration increases by a factor of 4. (d) The centripetal acceleration decreases by a factor of 2. (e) The centripetal acceleration decreases by a factor of 4.

2 Physics, 7e TEST BANK A car traveling at 20 m/s rounds a curve so that its centripetal acceleration is 5 m/s 2. What is the radius of the curve? (a) 4 m (c) 80 m (e) 640 m (b) 8 m (d) 160 m 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 2 Questions 9 and 10 pertain to the following situation: One of the world s largest Ferris wheels, the Cosmo Clock 21 with a radius of 50.0 m is located in Yokohama City, Japan. Each of the sixty gondolas on the wheel takes 1.00 minute to complete one revolution when it is running at full speed. Note: Ignore gravitational effects. 9. What is the uniform speed of a gondola when the Ferris wheel is running at full speed? (a) 314 m/s (c) 10.5 m/s (e) 5.24 m/s (b) 1.67 m/s (d) 18.6 m/s 10. What is the centripetal acceleration of the gondola when the Ferris wheel is running at full speed? (a) m/s 2 (c) 2.21 m/s 2 (e) 6.28 m/s 2 (b) 6.91 m/s 2 (d) m/s 2 Section 5.3 Centripetal Force 11. 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 F T. 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. 12. A 0.25-kg ball attached to a string is rotating in a horizontal circle of radius 0.5 m. If the ball revolves twice every second, what is the tension in the string? (a) 2 N (c) 7 N (e) 20 N (b) 5 N (d) 10 N 13. A certain string just breaks when it is under 25 N of tension. A boy uses this string to whirl a 2-kg stone in a horizontal circle of radius 3 m. The boy continuously increases the speed of the stone. At approximately what speed will the string break? (a) 6 m/s (c) 12 m/s (e) 18 m/s (b) 9 m/s (d) 15 m/s

3 56 Chapter 5 Dynamics of Uniform Circular Motion 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 Section 5.4 Banked Curves 16. Which force is responsible for holding a car in a frictionless banked curve? (a) the reaction force to the car's weight (b) the vertical component of the car's weight (c) the vertical component of the normal force (d) the horizontal component of the car's weight (e) the horizontal component of the normal force 17. Which force is responsible for holding a car in an unbanked curve? (a) the car's weight (b) the force of friction (c) the reaction force to the car's weight (d) the vertical component of the normal force (e) the horizontal component of the normal force 18. Complete the following statement: 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. 19. Complete the following statement: The maximum speed at which a car can safely negotiate a frictionless banked curve depends on all of the following except (a) the mass of the car. (b) the angle of banking. (c) the diameter of the curve. (d) the radius of the curve. (e) the acceleration due to gravity. 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

4 Physics, 7e TEST BANK A car enters a horizontal, curved roadbed of radius 50 m. The coefficient of static friction between the tires and the roadbed is What is the maximum speed with which the car can safely negotiate the unbanked curve? (a) 5 m/s (c) 20 m/s (e) 100 m/s (b) 10 m/s (d) 40 m/s 22. An indoor track is to be designed such that each end is a banked semi-circle with a radius of 24 m. What should the banking angle be for a person running at speed v = 6.0 m/s? (a) 8.7 (c) 14 (e) 45 (b) 11 (d) 22 Questions 23 through 25 pertain to the statement below: A 1000-kg Jeep travels along a straight 500-m portion of highway (from A to B) at a constant speed of 10 m/s. At B, the Jeep encounters an unbanked curve of radius 50 m. The Jeep follows the road from B to C traveling at a constant speed of 10 m/s while the direction of the Jeep changes from east to south. A W 10 m/s N E S B 50 m C 23. What is the magnitude of the acceleration of the Jeep 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 Jeep 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 Jeep negotiates the curve from B to C? (a) N (c) 5000 N (e) 1000 N (b) N (d) 2000 N Section 5.5 Satellites in Circular Orbit Section 5.6 Apparent Weightlessness and Artificial Gravity 26. The earth exerts the necessary centripetal force on an orbiting satellite to keep it moving in a circle at constant speed. Which one of the following statements 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.

5 58 Chapter 5 Dynamics of Uniform Circular Motion 27. Callisto and Io are two of Jupiter's satellites. The distance from Callisto to the center of Jupiter is approximately 4.5 times farther than the distance from Io to the center of Jupiter. How does Callisto's orbital period, T C, compare to that of Io, T I? (a) T C = 4.5 T I (c) T C = 9.5 T I (e) T C = 2.7 T I (b) T C = 21 T I (d) T C = 0.2 T I 28. Consider a hypothetical planet in our solar system whose average distance from the Sun is about four times that of Earth. Determine the orbital period for this hypothetical planet. (a) 0.25 year (c) 4 years (e) 16 years (b) 2.5 years (d) 8 years 29. Consider a satellite in a circular orbit around the Earth. If it were at an altitude equal to twice the radius of the Earth, 2R E, how would its speed v relate to the Earth's radius R E, and the magnitude g of the acceleration due to gravity on the Earth's surface? (a) 2 gre 2 gre v = (c) v = 9 3 (e) (b) 2 2 gre v = 2gRE (d) v = 4 2 gre v = A satellite is placed in equatorial orbit above Mars, which has a radius of 3397 km and a mass M M = 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 31. A satellite in orbit around the earth has a period of one hour. An identical satellite is placed in an orbit having a radius that is nine times larger than that of the first satellite. What is the period of the second satellite? (a) 0.04 h (c) 4 h (e) 27 h (b) 3 h (d) 9 h 32. The orbital radius of Saturn about the Sun is about 10 times that of Earth. Complete the following statement: The period of Saturn is about (a) 10 yr. (c) 40 yr. (e) 160 yr. (b) 30 yr. (d) 90 yr. 33. An artificial satellite in a circular orbit around the Sun has a period of 8 years. Determine the ratio of the satellite's orbital radius about the Sun to the earth's orbital radius about the Sun. Assume that the earth's orbit about the Sun is circular. (a) 1 (c) 4 (e) 23 (b) 2 (d) The mass and radius of the moon are kg and m, respectively. What is the weight of a 1.0-kg object on the surface of the moon? (a) 1.0 N (c) 3.7 N (e) 9.8 N (b) 1.7 N (d) 8.8 N 35. An object weighs 10 N on the earth's surface. What is the weight of the object on a planet that has one tenth the earth's mass and one half the earth's radius? (a) 4 N (c) 1 N (e) 20 N (b) 2 N (d) 10 N

6 Physics, 7e TEST BANK 59 Questions 36 through 38 pertain to the situation described below: A 2400-kg satellite is in a circular orbit around a planet. The satellite travels with a constant speed of m/s. The radius of the circular orbit is m. satellite planet 36. At the instant shown in the figure, which arrow indicates the direction of the net force on the satellite? (a) (b) (c) (d) (e) 37. What is the acceleration of the satellite? (a) 2.5 m/s 2 (c) 9.8 m/s 2 (e) zero m/s 2 (b) 21 m/s 2 (d) 5.0 m/s Determine the magnitude of the gravitational force exerted on the satellite by the planet. (a) N (d) N (b) N (e) This cannot be determined since the mass (c) N and radius of the planet are not specified. 39. What is the acceleration due to gravity at an altitude of m above the earth's surface? Note: the radius of the earth is m. (a) 3.99 m/s 2 (c) 5.00 m/s 2 (e) 7.32 m/s 2 (b) 9.80 m/s 2 (d) 6.77 m/s The radius of the earth is m and its mass is kg. What is the acceleration due to gravity at a height of m above the earth's surface? (a) 1.08 m/s 2 (c) 9.80 m/s 2 (e) m/s 2 (b) 2.15 m/s 2 (d) m/s A spaceship is in orbit around the earth at an altitude of miles. Which one of the following statements best explains why the astronauts experience weightlessness? (a) The centripetal force of the earth on the astronaut in orbit is zero newtons. (b) The pull of the earth on the spaceship is canceled by the pull of the other planets. (c) The spaceship is in free fall and its floor cannot press upwards on the astronauts. (d) The force of gravity decreases as the inverse square of the distance from the earth's center. (e) The force of the earth on the spaceship and the force of the spaceship on the earth cancel because they are equal in magnitude but opposite in direction. 42. A space station is designed in the shape of a large, hollow donut that is uniformly rotating. The outer radius of the station is 350 m. With what period must the station rotate so that a person sitting on the outer wall experiences artificial gravity, i.e. an acceleration of 9.8 m/s 2? (a) 230 s (c) 110 s (e) 38 s (b) 170 s (d) 76 s

7 60 Chapter 5 Dynamics of Uniform Circular Motion 43. The radius of the earth is 6400 km. An incoming meteorite approaches the earth along the trajectory shown. The point C in the figure is 6400 km above the earth s surface. The point A is located at the earth s center. At point C, what acceleration would the meteorite experience due to the earth s gravity? A C 30 B (a) 9.8 m/s 2 toward A (c) 2.5 m/s 2 toward B (e) 5.0 m/s 2 toward A (b) 2.5 m/s 2 toward A (d) 5.0 m/s 2 toward B *Section 5.7 Vertical Circular Motion 44. A plane is traveling at 200 m/s following the arc of a vertical circle of radius R. At the top of its path, the passengers experience weightlessness. To one significant figure, what is the value of R? (a) 200 m (d) 4000 m (b) 1000 m (e) m (c) 2000 m R 200 m/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 R A 46. A 0.75-kg ball is attached to a 1.0-m rope and whirled in a vertical circle. The rope will break when the tension exceeds 450 N. What is the maximum speed the ball can have at the bottom of the circle without breaking the rope? (a) 24 m/s (c) 32 m/s (e) 38 m/s (b) 12 m/s (d) 16 m/s Questions 47 and 48 pertain to the situation described below: A small car of mass M travels along a straight, horizontal track. R As suggested in the figure, the track then bends into a vertical circle of radius R. M 47. What is the minimum acceleration that the car must have at the top of the track if it is to remain in contact with the track? (a) 4.9 m/s 2, downward (c) 9.8 m/s 2, downward (e) 19.6 m/s 2, upward (b) 4.9 m/s 2, upward (d) 9.8 m/s 2, upward

8 Physics, 7e TEST BANK Which one of the following expressions determines the minimum speed that the car must have at the top of the track if it is to remain in contact with the track? (a) v = MgR (c) v 2 = 2gR (e) v = gr (b) v = 2gR (d) v 2 = gr Additional Problems Questions 49 through 52 pertain to the situation described below: A 1500-kg SUV 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 SUV? (a) The velocity of the SUV is changing. (b) The SUV is characterized by constant velocity. (c) The SUV is characterized by constant acceleration. (d) The SUV has a velocity vector that points along the radius of the circle. (e) The SUV has an acceleration vector that is tangent to the circle at all times. 50. What is the magnitude of the acceleration of the SUV? (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 SUV 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 SUV. (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 Questions 54 through 56 pertain to the situation described below: A rocket orbits a planet in a circular orbit at a constant speed as shown in the drawing. Note these arrows: [1] [2] [3] [4] [5] 54. At the instant shown in the drawing, which arrow indicates the direction of the acceleration of the rocket? (a) 1 (c) 3 (e) 5 (b) 2 (d) 4

9 62 Chapter 5 Dynamics of Uniform Circular Motion 55. At the instant shown in the drawing, which arrow shows the direction of the reaction force exerted on the planet by the rocket? (a) 1 (c) 3 (e) 5 (b) 2 (d) Suppose that the radius of the circular path is r when the speed of the rocket is v and the acceleration of the rocket has magnitude a. If the radius and speed are increased to 2r and 2v respectively, what is the magnitude of the rocket's subsequent acceleration? a (a) (c) a (e) 8a 2 (b) 2a (d) 4a 57. The record for the highest speed achieved in a laboratory for a uniformly rotating object was m/s for a 0.15-m long carbon rod. What was the period of rotation of the rod? (a) s (c) s (e) s (b) s (d) s Questions 58 and 59 pertain to the following situation. An airplane flying at 115 m/s due east makes a gradual turn following a circular path to fly south. The turn takes 15 seconds to complete. 58. What is the radius of the curve that the plane follows in making the turn? (a) 280 m (c) 830 m (e) 1600 m (b) 350 m (d) 1100 m 59. What is the magnitude of the centripetal acceleration during the turn? (a) zero m/s 2 (c) 8.1 m/s 2 (e) 12 m/s 2 (b) 6.9 m/s 2 (d) 9.8 m/s 2

A) 0.25 year B) 2.5 years C) 4 years D) 8 years E) 16 years

A) 0.25 year B) 2.5 years C) 4 years D) 8 years E) 16 years Name: Date: 1. A ball is whirled on the end of a string in a horizontal circle of radius R at constant speed v. Complete the following statement: The centripetal acceleration of the ball can be increased

More information

Physics 125 Practice Exam #2 Chapters 4-5 Professor Siegel

Physics 125 Practice Exam #2 Chapters 4-5 Professor Siegel Physics 125 Practice Exam #2 Chapters 4-5 Professor Siegel Name: Lab Day: 1. With one exception, each of the following units can be used to express mass. What is the exception? A) newton B) slug C) gram

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

5. If the velocity of the ball is doubled, the centripetal acceleration (1) is halved (3) remains the same (2) is doubled (4) is quadrupled

5. If the velocity of the ball is doubled, the centripetal acceleration (1) is halved (3) remains the same (2) is doubled (4) is quadrupled Base your answers to questions 1 through 3 on the diagram below which represents a 2.0-kilogram mass moving in a circular path on the end of a string 0.50 meter long. The mass moves in a horizontal plane

More information

Final Review (F2007) Chapter 2: Describing Motion: Kinematics in One Dimension

Final Review (F2007) Chapter 2: Describing Motion: Kinematics in One Dimension Physics I Mechanics Final Review (F2007) Name: ANSWER KEY Chapter 2: Describing Motion: Kinematics in One Dimension 1. Suppose that a car traveling to the East (+x direction) begins to slow down as it

More information

PHY1 Review for Exam 5

PHY1 Review for Exam 5 Topics 1. Uniform circular Motion a. Centripetal acceleration b. Centripetal force c. Horizontal motion d. ertical motion e. Circular motion with an angle 2. Universal gravitation a. Gravitational force

More information

Circular Velocity and Centripetal Acceleration

Circular Velocity and Centripetal Acceleration 1. An object is spun around in circular motion such that it completes 100 cycles in 25 s. a. What is the period of its rotation? [0.25 s] b. If the radius is 0.3 m what is the velocity? [7.54 m/s] Circular

More information

9) If the velocity versus time graph of an object is a horizontal line, the object is A) moving with zero acceleration.

9) If the velocity versus time graph of an object is a horizontal line, the object is A) moving with zero acceleration. 1) Which of the following quantities has units of a velocity? (There could be more than one correct choice.) A) 40 km southwest B) -120 m/s C) 9.8 m/s2 downward D) 186,000 mi E) 9.8 m/s downward 2) Suppose

More information

The Bronx High School of Science Physics - Exam

The Bronx High School of Science Physics - Exam The Bronx High School of Science Physics - Exam Base your answers to questions 1 through 4 on the diagram below which represents a 2.0-kilogram mass moving in a circular path on the end of a string 0.50

More information

A. 5 m/s B. 1 m/s C. 0 m/s D. 10 m/s E. 2 m/s

A. 5 m/s B. 1 m/s C. 0 m/s D. 10 m/s E. 2 m/s SQ1: Carl Lewis set a world record for the 100.0-m run with a time of 9.86 s. If, after reaching the finish line, Mr. Lewis walked directly back to his starting point in 90.14 s, what is the magnitude

More information

Physics 1401 - Exam 2 Chapter 5N-New

Physics 1401 - Exam 2 Chapter 5N-New Physics 1401 - Exam 2 Chapter 5N-New 2. The second hand on a watch has a length of 4.50 mm and makes one revolution in 60.00 s. What is the speed of the end of the second hand as it moves in uniform circular

More information

Newton s Laws Name: Per: Teacher: What is a force? Newton s First Law (Law of Inertial) What do forces cause?

Newton s Laws Name: Per: Teacher: What is a force? Newton s First Law (Law of Inertial) What do forces cause? Physics B Newton s Laws Name: Per: Teacher: What is a force? Newton s First Law (Law of Inertial) What do forces cause? What is the relationship between mass and inertia? Draw a force diagram on the book.

More information

Use Newton's second law to determine the normal force acting upon Noah's 80-kg body at the top and at the bottom of the loop.

Use Newton's second law to determine the normal force acting upon Noah's 80-kg body at the top and at the bottom of the loop. Regents Physics- Circular Motion Problems- Uniform and otherwise Name: Date: 1.Rex and Doris are out on a date. Rex makes a rapid right-hand turn. Doris begins sliding across the vinyl seat and collides

More information

PSI AP Physics 1 Circular Motion

PSI AP Physics 1 Circular Motion PSI AP Physics 1 Circular Motion Multiple Choice 1. A ball is fastened to a string and is swung in a vertical circle. When the ball is at the highest point of the circle its velocity and acceleration directions

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

Kinetic Energy and Work

Kinetic Energy and Work PHYS 101 Previous Exam Problems CHAPTER 7 Kinetic Energy and Work Kinetic energy Work Work-energy theorem Gravitational work Work of spring forces Power 1. A single force acts on a 5.0-kg object in such

More information

Practice problems for the 2nd exam

Practice problems for the 2nd exam Practice problems for the 2nd exam Show your work and the solutions so the instructor can see how much you put efforts to understand. This will be one of your credits toward your final grade. 1. A 4.60-kg

More information

PHY231 Section 2, Form B March 22, 2012

PHY231 Section 2, Form B March 22, 2012 1. A 200-kg cannon at rest contains a 10-kg cannon ball. When fired, the cannon ball leaves the cannon with a speed of 90 m/s. What is the recoil speed of the cannon? A) 4.5 m/s B) 9 m/s C) 45 m/s D) 90

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

B. the same as that of the lead ball C. less than that of the lead ball D. 9.8 m/s 2 E. zero since it floats in a vacuum

B. the same as that of the lead ball C. less than that of the lead ball D. 9.8 m/s 2 E. zero since it floats in a vacuum ENGPHY1 QUIZ 2 Force Laws of Motion Circular Motion Other Applications of Newton's Laws MULTIPLE CHOICE 1. Acceleration is always in the direction: A. of the displacement B. of the initial velocity C.

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

FORCES AND NEWTON S LAWS OF MOTION

FORCES AND NEWTON S LAWS OF MOTION chapter FORCES AND NEWTON S LAWS OF MOTION Section 4.1 The Concepts of Force and Mass Section 4.2 Newton s First Law of Motion Section 4.3 Newton s Second Law of Motion 1. With one exception, each of the

More information

12. A 20-kg crate is suspended from a fixed beam by two vertical ropes. What is the tension in each rope? A) 10 N B) 40 N C) 100 N D) 200 N E) 390 N

12. A 20-kg crate is suspended from a fixed beam by two vertical ropes. What is the tension in each rope? A) 10 N B) 40 N C) 100 N D) 200 N E) 390 N Name: Date: 1. The surface of a lake has an area of 15.5 km 2. What is the area of the lake in m 2? A) 1.55 10 4 m 2 B) 1.55 10 5 m 2 C) 1.55 10 6 m 2 D) 1.55 10 7 m 2 E) 1.55 10 8 m 2 2. A certain physical

More information

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

= ma C. = m v2 r ; 3.00 kg. (constant); PE B0 PE A. (m + m 2 A B )v2 = PE B0. = 1 2 m B v2 = KE f

= ma C. = m v2 r ; 3.00 kg. (constant); PE B0 PE A. (m + m 2 A B )v2 = PE B0. = 1 2 m B v2 = KE f 1. A certain string just breaks when it is under 25 N of tension. A boy uses this string to whirl a 0.75-kg stone in a horizontal circle of radius 2.0 m. The boy continuously increases the speed of the

More information

Chapter 6. Circular Motion, Orbits, and Gravity. PowerPoint Lectures for College Physics: A Strategic Approach, Second Edition

Chapter 6. Circular Motion, Orbits, and Gravity. PowerPoint Lectures for College Physics: A Strategic Approach, Second Edition Chapter 6 Circular Motion, Orbits, and Gravity PowerPoint Lectures for College Physics: A Strategic Approach, Second Edition 6 Circular Motion, Orbits, and Gravity Slide 6-2 Slide 6-3 Slide 6-4 Slide 6-5

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

AP Physics 1 Fall Semester Review

AP Physics 1 Fall Semester Review AP Physics 1 Fall Semester Review One Dimensional Kinematics 1. Be able to interpret motion diagrams. a. Assuming there are equal time intervals between each picture shown above, which car in the diagram

More information

Chapter 6 Circular Motion, Orbits and Gravity

Chapter 6 Circular Motion, Orbits and Gravity Chapter 6 Circular Motion, Orbits and Gravity Topics: The kinematics of uniform circular motion The dynamics of uniform circular motion Circular orbits of satellites Newton s law of gravity Sample question:

More information

The Force of Gravity exists between any two masses! Always attractive do you feel the attraction? Slide 6-35

The Force of Gravity exists between any two masses! Always attractive do you feel the attraction? Slide 6-35 The Force of Gravity exists between any two masses! Always attractive do you feel the attraction? Slide 6-35 Summary Newton s law of gravity describes the gravitational force between A. the earth and the

More information

HOW DO YOU GET SOMETHING TO MOVE IN A CIRCLE?

HOW DO YOU GET SOMETHING TO MOVE IN A CIRCLE? CIRCULAR MOTION HOW DO YOU GET SOMETHING TO MOVE IN A CIRCLE? Name one thing that travels in a circular path. (not something that spins) What are some things we could measure about its motion? Consider

More information

Centripetal Acceleration & Centripetal Forces

Centripetal Acceleration & Centripetal Forces Centripetal Acceleration & Centripetal Forces This is circular motion. When an object moves in a circular motion at a constant speed, it has uniform circular motion. The magnitude of the velocity remains

More information

Circular Motion and Gravitation. a R = v 2 v. Period and Frequency. T = 1 f. Centripetal Acceleration acceleration towards the center of a circle.

Circular Motion and Gravitation. a R = v 2 v. Period and Frequency. T = 1 f. Centripetal Acceleration acceleration towards the center of a circle. Circular Motion and Gravitation Centripetal Acceleration acceleration towards the center of a circle. a.k.a. Radial Acceleration (a R ) v v Ball rolling in a straight line (inertia) Same ball, hooked to

More information

UCM-Circular Motion. Base your answers to questions 1 and 2 on the information and diagram below.

UCM-Circular Motion. Base your answers to questions 1 and 2 on the information and diagram below. Base your answers to questions 1 and 2 on the information and diagram The diagram shows the top view of a 65-kilogram student at point A on an amusement park ride. The ride spins the student in a horizontal

More information

Circular Motion and Gravitation

Circular Motion and Gravitation Nicholas J. Giordano www.cengage.com/physics/giordano Circular Motion and Gravitation Introduction Circular motion Acceleration is not constant Cannot be reduced to a one-dimensional problem Examples Car

More information

1) Your mass on the moon will be about one-sixth of your mass on Earth.

1) Your mass on the moon will be about one-sixth of your mass on Earth. Exam Name TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) Your mass on the moon will be about one-sixth of your mass on Earth. 1) 2) The kinetic coefficient of friction

More information

Chapter 5 Circular Motion, the Planets, and Gravity

Chapter 5 Circular Motion, the Planets, and Gravity Chapter 5 Circular Motion, the Planets, and Gravity Does the circular motion of the moon around the Earth...... have anything in common with circular motion on Earth? A ball is whirled on the end of a

More information

UCM-Circular Motion. Base your answers to questions 1 and 2 on the information and diagram below.

UCM-Circular Motion. Base your answers to questions 1 and 2 on the information and diagram below. Base your answers to questions 1 and 2 on the information and diagram The diagram shows the top view of a 65-kilogram student at point A on an amusement park ride. The ride spins the student in a horizontal

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

PSI AP Physics 1 Gravitation

PSI AP Physics 1 Gravitation PSI AP Physics 1 Gravitation Multiple Choice 1. Two objects attract each other gravitationally. If the distance between their centers is cut in half, the gravitational force A) is cut to one fourth. B)

More information

Chapter 5: Circular Motion, the Planets, and Gravity

Chapter 5: Circular Motion, the Planets, and Gravity Chapter 5: Circular Motion, the Planets, and Gravity 1. Earth s gravity attracts a person with a force of 120 lbs. The force with which the Earth is attracted towards the person is A. Zero. B. Small but

More information

d. Any of the above. (surface exerting friction can move)

d. Any of the above. (surface exerting friction can move) I use a rope 2.00 m long to swing a 10.0-kg weight around my head. The tension in the rope is 20.0 N. In half a revolution how much work is done by the rope on the weight? d. 0 (tension perpendicular to

More information

MECHANICS: CIRCULAR MOTION QUESTIONS SATELLITES (2015;1) Mass of Earth = 5.97 x kg Universal gravitational constant = 6.67 x N m 2 kg -2

MECHANICS: CIRCULAR MOTION QUESTIONS SATELLITES (2015;1) Mass of Earth = 5.97 x kg Universal gravitational constant = 6.67 x N m 2 kg -2 MECHANICS: CIRCULAR MOTION QUESTIONS SATELLITES (2015;1) Mass of Earth = 5.97 x 10 24 kg Universal gravitational constant = 6.67 x 10-11 N m 2 kg -2 Digital television in New Zealand can be accessed by

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

Exam 2 PREP Chapters 4 & 5

Exam 2 PREP Chapters 4 & 5 PHY241 - General Physics I Dr. Carlson, Fall 2013 Prep Exam 2 PREP Chapters 4 & 5 Name TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) If a 5.0 kg box is pulled simultaneously

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) The graph in the figure shows the x component of the acceleration of a 2.4-kg object as a

More information

Physics Samples: Q2 Exam Per Date Name

Physics Samples: Q2 Exam Per Date Name Physics Samples: Q2 Exam Per Date Name 1. According to your reference table, Approximate Coefficents of Friction, what is the minimum horizontal force needed to start a 300. kilogram steel block on a steel

More information

Section 5: Solving Circular Motion Problems the Vertical Circle

Section 5: Solving Circular Motion Problems the Vertical Circle Section 5: Solving Circular Motion Problems the Vertical Circle In the last section, we worked with objects moving in a circle in a horizontal plane. In these situations, the weight of the moving object

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

10 Circular Motion. Centripetal force keeps an object in circular motion.

10 Circular Motion. Centripetal force keeps an object in circular motion. Centripetal force keeps an object in circular motion. Which moves faster on a merry-go-round, a horse near the outside rail or one near the inside rail? While a hamster rotates its cage about an axis,

More information

"Everything should be made as simple as possible, but not simpler." - Albert Einstein

Everything should be made as simple as possible, but not simpler. - Albert Einstein Physics Schedule Chapter Five Centripetal Motion & Gravity October 20 th November 3 rd, 2015 Date Activity/Topic Assignment due next day Tuesday, Universal Law of Gravity Worksheet 1 October 20 Block,

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

CIRCULAR MOTION AND GRAVITATION

CIRCULAR MOTION AND GRAVITATION CIRCULAR MOTION AND GRAVITATION An object moves in a straight line if the net force on it acts in the direction of motion, or is zero. If the net force acts at an angle to the direction of motion at any

More information

Exam Review Tuesday, September 17, :00 PM

Exam Review Tuesday, September 17, :00 PM ExamReview Page 1 Exam Review Tuesday, September 17, 2013 10:00 PM Chapter 2, Problem 65 A juggler throws a ball straight up with an initial speed of 10 m/s. With what speed would she need to throw a second

More information

The net force on the object always acts along the line of motion of the object.

The net force on the object always acts along the line of motion of the object. Physics 125 Practice-makes-perfect Quiz Chapter 4&5 These are the types of problems that you will see on the quizzes. Use this practice quiz as a gauge for your understanding of physics. The answers are

More information

8 Rotational Motion. Conceptual Questions. 1) Angular displacement is usually express in units of A) meters. B) radians. C) revolutions. D) arcs.

8 Rotational Motion. Conceptual Questions. 1) Angular displacement is usually express in units of A) meters. B) radians. C) revolutions. D) arcs. 8 Rotational Motion Conceptual Questions 1) Angular displacement is usually express in units of A) meters. B) radians. C) revolutions. D) arcs. 1 2) Angular velocity is expressed in units of A) meters

More information

Motion in Two Dimensions

Motion in Two Dimensions Motion in Two Dimensions 1. The position vector at t i is r i and the position vector at t f is r f. The average velocity of the particle during the time interval is a.!!! ri + rf v = 2 b.!!! ri rf v =

More information

PH 221-1D Spring Force and Motion II. Lecture Chapter 6 (Halliday/Resnick/Walker, Fundamentals of Physics 9 th edition)

PH 221-1D Spring Force and Motion II. Lecture Chapter 6 (Halliday/Resnick/Walker, Fundamentals of Physics 9 th edition) PH 221-1D Spring 2013 Force and Motion II Lecture 12-13 Chapter 6 (Halliday/Resnick/Walker, Fundamentals of Physics 9 th edition) Chapter 6 Force and Motion II In this chapter we will cover the following

More information

Uniform Circular Motion. Introduction Earlier we defined acceleration as being the change in velocity with time:

Uniform Circular Motion. Introduction Earlier we defined acceleration as being the change in velocity with time: Uniform Circular Motion Introduction Earlier we defined acceleration as being the change in velocity with time: = Until now we have only talked about changes in the magnitude of the acceleration: the speeding

More information

Physics Benchmark 2 Study Guide - (with answers)

Physics Benchmark 2 Study Guide - (with answers) Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. _d 1. A rope pulls horizontally on a 4-kg block. The floor exerts a 7N frictional force on the

More information

Chapter 6 The Gravitational Force and the Gravitational Field

Chapter 6 The Gravitational Force and the Gravitational Field Chapter 6 The Gravitational Force and the Gravitational Field Newton s Law of Universal Gravitation F GMm = 2 r F is the force of an object with mass M on an object with mass m r is a unit vector pointing

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

Exam II. Spring 2003 Serway, Chapters 6-10

Exam II. Spring 2003 Serway, Chapters 6-10 Assigned Seat umber Agin/Morgan Exam II Spring 2003 Serway, Chapters 6-10 PH2100 0A/0B Part I: Qualitative Write the letter of the correct answer on the answer sheet. O PARTIAL CREDIT: SUBMIT OE ASWER

More information

Name Class Date. The concept that additionally depends on location in a gravitational field is (mass) (weight).

Name Class Date. The concept that additionally depends on location in a gravitational field is (mass) (weight). 3-1 Mass and Weight Learning physics is learning the connections among concepts in nature, and also learning to distinguish between closely related concepts. Velocity and acceleration, which are treated

More information

Turn in both the exam and the scantron sheets at the end of the exam.

Turn in both the exam and the scantron sheets at the end of the exam. Physics 161 NAME ANSWERS Final Exam Section # Dr. Dennis Drew May 17, 2004 Turn in both the exam and the scantron sheets at the end of the exam. Part I : 3 Partial credit questions each worth 11 pts. Show

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

v 1 v 2 Circular Motion F c =mv 2 /r a c =v 2 /r Fc=4π 2 mr/t 2 ac=4π 2 r/t 2 Centripetal Force Problem Types: 1. Rock on a String Fc = T (Tension)

v 1 v 2 Circular Motion F c =mv 2 /r a c =v 2 /r Fc=4π 2 mr/t 2 ac=4π 2 r/t 2 Centripetal Force Problem Types: 1. Rock on a String Fc = T (Tension) Circular Motion F c =mv 2 /r =v 2 /r =4π 2 mr/t 2 ac=4π 2 r/t 2 v tan Centripetal Force Problem Types: 1. Rock on a String = T (Tension) v 2. Moon & Planet = F G (Gravitational Force) 3. Car on a Curve

More information

Practice Final. A) 0.50 m/s B) 0.2 m/s C) 1.0 m/s D) 1.3 m/s Answer: C

Practice Final. A) 0.50 m/s B) 0.2 m/s C) 1.0 m/s D) 1.3 m/s Answer: C Practice Final 1) Figure represents the position of a particle as it travels along the x-axis. What is the average speed of the particle between t = 2 s and t = 4 s? A) 0.50 m/s B) 0.2 m/s C) 1.0 m/s D)

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

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

4. Using her measured quantities, what must she graph to linearize the graph so that the slope of the line is the acceleration due to gravity?

4. Using her measured quantities, what must she graph to linearize the graph so that the slope of the line is the acceleration due to gravity? Linear Kinematics 1. A student wants to determine the height of an unreachable object. The materials available include a protractor and tape for measuring small distances. Describe a procedure that can

More information

Chapter 5 Applying Newton s Laws

Chapter 5 Applying Newton s Laws Chapter 5 Applying Newton s Laws In this chapter we will introduce more applications of Newton s 1 st and 2 nd law. In summary, all of the contact forces and action-at-a-distance forces will go on the

More information

THE NATURE OF FORCES Forces can be divided into two categories: contact forces and non-contact forces.

THE NATURE OF FORCES Forces can be divided into two categories: contact forces and non-contact forces. SESSION 2: NEWTON S LAWS Key Concepts In this session we Examine different types of forces Review and apply Newton's Laws of motion Use Newton's Law of Universal Gravitation to solve problems X-planation

More information

Quest Chapter 13. Where is the event happening? What does the no atmosphere phrase mean in the problem? What is the ball doing during the event?

Quest Chapter 13. Where is the event happening? What does the no atmosphere phrase mean in the problem? What is the ball doing during the event? 1 (part 1 of 2) A ball is tossed straight up from the surface of a small, spherical asteroid with no atmosphere. The ball rises to a height equal to the asteroid s radius and then falls straight down toward

More information

Gravity & Circular Motion

Gravity & Circular Motion Physics Name: KEY Date: Period: Gravity & Circular Motion (Unit Review) Gravity Circular Motion Centripetal force Periodic motion Rotation Revolution Axis of rotation Axis of revolution Tangential (linear)

More information

AP Physics Circular Motion Practice Test B,B,B,A,D,D,C,B,D,B,E,E,E, 14. 6.6m/s, 0.4 N, 1.5 m, 6.3m/s, 15. 12.9 m/s, 22.9 m/s

AP Physics Circular Motion Practice Test B,B,B,A,D,D,C,B,D,B,E,E,E, 14. 6.6m/s, 0.4 N, 1.5 m, 6.3m/s, 15. 12.9 m/s, 22.9 m/s AP Physics Circular Motion Practice Test B,B,B,A,D,D,C,B,D,B,E,E,E, 14. 6.6m/s, 0.4 N, 1.5 m, 6.3m/s, 15. 12.9 m/s, 22.9 m/s Answer the multiple choice questions (2 Points Each) on this sheet with capital

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

1 st Semester Review 1980s problems

1 st Semester Review 1980s problems 1 st Semester Review 1980s problems 1980B1. A ball of weight 5 newtons is suspended by two strings as shown above. a. In the space below, draw and clearly label all the forces that act on the ball. b.

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

Physics 6A MWF Section Winter 2012 Final

Physics 6A MWF Section Winter 2012 Final Physics 6A MWF Section Winter 2012 Final Enter the answer to the multiple choice questions on the pink scantron sheet. Use a pencil, not a pen. There is no penalty for the wrong answer Write your name

More information

2-1. Concept-Development Practice Page. Static Equilibrium CONCEPTUAL PHYSICS. Name Class Date

2-1. Concept-Development Practice Page. Static Equilibrium CONCEPTUAL PHYSICS. Name Class Date Static Equilibrium 1. Little Nellie Newton wishes to be a gymnast and hangs from a variety of positions as shown. Since she is not accelerating, the net force on her is zero. That is, F = 0. This means

More information

Review Questions #1. Physics Fall 2007

Review Questions #1. Physics Fall 2007 Review Questions #1 Physics 102.002 Fall 2007 Which of these is an accurate statement of Newton's first law? When there is no net force, an object a. at rest remains at rest. b. in motion remains in motion.

More information

Practice Exam 3, Chs

Practice Exam 3, Chs Practice Exam 3, Chs. 10-14 Chapter 10 1. A CD has a diameter of 12.0 cm. If the CD is rotating at a constant frequency of 6.00 cycles per second, then the angular velocity is A. 21.5 rad/s B. 26.9 rad/s

More information

Gravity. Newton s Law of Gravitation Kepler s Laws of Planetary Motion Gravitational Fields

Gravity. Newton s Law of Gravitation Kepler s Laws of Planetary Motion Gravitational Fields Gravity Newton s Law of Gravitation Kepler s Laws of Planetary Motion Gravitational Fields Newton s Law of Gravitation r m 2 m 1 There is a force of gravity between any pair of objects anywhere. The force

More information

Revised 11/ LC, tlo

Revised 11/ LC, tlo PROBLEM SOLVING-90A CP(OBJECT IN UCM) Problem: A 5 kg object is in uniform circular motion traveling a circular path of radius 1.2 m with a speed of 23 m/s. (a) What is the object's centripetal acceleration?

More information

Review sheet. 1. A car accelerates uniformly from rest to a speed of 10 meters per second in 2 seconds. The acceleration of the car is

Review sheet. 1. A car accelerates uniformly from rest to a speed of 10 meters per second in 2 seconds. The acceleration of the car is Name: ate: 1. car accelerates uniformly from rest to a speed of 10 meters per second in 2 seconds. The acceleration of the car is. 0.2 m/sec 2. 5 m/sec 2 5. The graph shown represents the relationship

More information

Applications of Newton s Laws

Applications of Newton s Laws Chapter 5 Applications of Newton s Laws We shall apply Newton s laws of motion to a variety of situations in which several types of forces are involved: Gravitational force Tension Contact Forces (including

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

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

Lecture Presentation. Chapter 6 Circular Motion, Orbits, and Gravity Pearson Education, Inc.

Lecture Presentation. Chapter 6 Circular Motion, Orbits, and Gravity Pearson Education, Inc. Lecture Presentation Chapter 6 Circular Motion, Orbits, and Gravity Suggested Videos for Chapter 6 Prelecture Videos Forces and Apparent Forces Solving Circular Motion Problems Orbits and Gravity Class

More information

Chapter 8-9. Rotation. Rotational Motion and The Law of Gravity

Chapter 8-9. Rotation. Rotational Motion and The Law of Gravity Chapter 8-9 Rotational Motion and The Law of Gravity There are two kinds of speeds During time t, the reference line moves through angle θ. Angular velocity w is the rate of rotation. (e.g 33 rpm) The

More information

1. Which unit is equivalent to a newton per kilogram? A) m. s 2 B) W. s C) J s D) kg m

1. Which unit is equivalent to a newton per kilogram? A) m. s 2 B) W. s C) J s D) kg m 1. Which unit is equivalent to a newton per kilogram? A) m s 2 B) W 6. Base your answer to the following question on The diagram below shows a student throwing a baseball horizontally at 25 meters per

More information

15.2 s how long is the slope? Assume that frictional forces may be neglected.

15.2 s how long is the slope? Assume that frictional forces may be neglected. FLEX Physical Science AP Physics C Mechanics - Midterm 1) If you set the cruise control of your car to a certain speed and take a turn, the speed of the car will remain the same. Is the car accelerating?

More information

Chapter 6 - Dynamics of Uniform Circular Motion w./ QuickCheck Questions

Chapter 6 - Dynamics of Uniform Circular Motion w./ QuickCheck Questions Chapter 6 - Dynamics of Uniform Circular Motion w./ QuickCheck Questions 2015 Pearson Education, Inc. Anastasia Ierides Department of Physics and Astronomy University of New Mexico September 24, 2015 Review

More information

4) A 445 N box is sliding down a frictionless 25 o inclined plane. Find the parallel component of the weight that causes the box to slide 188 N

4) A 445 N box is sliding down a frictionless 25 o inclined plane. Find the parallel component of the weight that causes the box to slide 188 N 1) A 7.6 kg object is at rest on an inclined plane. If the plane makes an angle with the horizontal of 33 o what is the normal force acting on the object? 62 N 2) A 7.6 kg object is pulled up an inclined

More information

Quest Chapter 05. Is the car is in equilibrium? Where will the forces act? Draw a diagram and label the forces.

Quest Chapter 05. Is the car is in equilibrium? Where will the forces act? Draw a diagram and label the forces. 1 (part 1 of 3) You are driving a car down a straight road at a constant 54 miles per hour. Consider the following forces: I) air drag pushing back on the car; II) gravity pulling down on the car; III)

More information

Great Escape Review. All students are required to complete this review packet based upon our upcoming trip to Great Escape for Physics Day.

Great Escape Review. All students are required to complete this review packet based upon our upcoming trip to Great Escape for Physics Day. Great Escape Review All students are required to complete this review packet based upon our upcoming trip to Great Escape for Physics Day. All work must be done on a separate sheet of paper. You must write

More information

Homework 4. problems: 5.61, 5.67, 6.63, 13.21

Homework 4. problems: 5.61, 5.67, 6.63, 13.21 Homework 4 problems: 5.6, 5.67, 6.6,. Problem 5.6 An object of mass M is held in place by an applied force F. and a pulley system as shown in the figure. he pulleys are massless and frictionless. Find

More information

Physics 180A Final Test Points

Physics 180A Final Test Points Physics 180A Final Test - 120 Points Name 1. Three horizontal ropes are attached to a boulder and produce the pulls shown in the figure. Find the magnitude and direction of the resulltant pull. (5 points)

More information

Physics 2211 ABC Quiz #2 Solutions Spring 2017

Physics 2211 ABC Quiz #2 Solutions Spring 2017 Physics 2211 ABC Quiz #2 Solutions Spring 2017 I. (16 points) Two carts are in concentric circular tracks. The first is a distance 2.5 m from the center and the second is a distance 7.5 m from the center.

More information