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


 Chester Stone
 7 years ago
 Views:
Transcription
1 Work, Energy & Momentum Homework Packet Worksheet 1: This is a lot of work! 1. A student holds her 1.5kg psychology textbook out of a second floor classroom window until her arm is tired; then she releases it. a. How much work is done on the book by the student in simply holding it out the window? b. How much work is done by the force of gravity during the time it falls 3.0 m? 2. You are carrying a backpack across campus. What is the work done by your verticalcarrying force on the backpack? Explain. 3. A 500. kg lightweight helicopter ascends from the ground with an acceleration of 2.00 m/s 2. Over a 5.00 sec interval, what is a. The distance the helicopter traveled? b. The work done by the lifting force? c. The work done by the gravitational force? d. The net work done on the helicopter? 4. A 0.75kg block slides with a uniform velocity down a 20.0 o inclined plane of horizontal length 1.2 m, as shown. a. Calculate the length of the ramp. b. How much work is done by the force of friction on the block as it slides the total length of the plane? c. What is the net work done on the block? (Explain/show work) L = 1.2m θ 5. (Challenge Problem) A worker pulls a 40.0kg crate with a rope at the 30.0 o angle to the horizontal. The coefficient of sliding friction between the crate and the floor is If he moves the crate with a constant velocity a distance of 7.00 m, how much work does the worker do on the crate? (hint: make 2 equations for 2 unknowns) KINETIC ENERGY & THE WORK ENERGY THEOREM 6. You want to decrease the kinetic energy of an object by as much as you can. You can do so by reducing the mass by half or reducing the speed by half. Which should you do and why? 7. A 1200kg automobile travels at 90.0 km/h. a. What is its kinetic energy? b. What net work would be required to bring it to a stop? 8. A 2.5 g bullet traveling at 350 m/s hits a tree and slows uniformly to a stop while penetrating a distance of 12 cm into the tree s trunk. What force was exerted on the bullet in bringing it to rest? 9. An 88g arrow is fired from a bow whose string exerts an average force of 110 N on the arrow over a distance of 78 cm. a. What is the speed of the arrow as it leaves the bow? b. How far down range will the arrow go if it is released horizontally from the bow and 1.5 m from the ground?
2 Worksheet 2: Conservation of Energy (w/ nonconservative forces) KE i + PE i = KE f + PE f 1. A 50.0 kg block at rest is dropped from a height of 20.0 m. a. Find PEi b. Find KEi c. What is the total energy of the system? d. Find PE when the block has been dropped down to the 5.0 m level. e. Find KE when the block has dropped to the 5.0 m level. f. Find the velocity when the block has dropped to the 5.0 m level. g. Find PE the instant before hitting the ground. h. Find KE the instant before hitting the ground. i. Find the velocity the instant before hitting the ground. 2. A 3.0 kg physics book at rest is accidentally dropped from the top of a very tall building (60.0 m) a. Find PEi b. Find KEi c. Find total energy of the system. d. Find PE when the book has dropped 10.0 m (not down to the 10m level) e. Find KE when the book has dropped 10.0 m f. Find the velocity when the book has dropped 10.0m g. Find the PE at the 20. m level. h. Find the KE at the 5.0 m level i. Find the velocity of the book at the 5.0 m level. Enter Nonconservative Forces: KE i + PE i + E added = KE f + PE f + E lost 3. A 4.0 kg block initially at rest is pushed on a level, frictionless surface with a constant force of 10. N for 6.0 m a. Find the speed of the block at 6.0 m b. Find the speed of the block at 2.0 m 4. A 20. kg crate at rest on a 10. m high ramp, requires a 100. J push to get it moving down the ramp. The ramp and crate experience 20. J of friction. What is the kinetic energy of the block at the bottom of the ramp? 5. A 5.0 kg block, initially at rest, slides down a 30.0 o ramp with a constant frictional force of 2.0 N. The top of the ramp is 6.0 m vertically from the bottom. a. How much energy does the block loose because of friction? b. How fast is the block going when it reaches the bottom? 6. Block A and block B have masses of 4.0 kg each. Block A is dropped from a 15 m building and block B slides down a frictionless ramp from the top of the same building. a. Which block is going fastest at the bottom? b. What is that velocity?
3 Worksheet 3: You Have the POWER 1. A 60.0 kg jogger runs, at constant velocity, up a long flight of stairs in 4.0 sec. The vertical height of the stairs is 4.5 m. a. If the only force the jogger has to overcome is her weight, calculate the jogger s power output in watts and horsepower. b. How much energy did this require? 2. A girl consumes 8.4x10 6 J (2000 food calories) of energy in one day while maintaining a constant weight. What is the average power she produces in a day? 3. Calculate the power required on a 1400 kg car while climbing a 10. o hill (a fairly steep hill) at a steady 80.0 km/h. Resistive forces on the car are 700. N. 4. A car generates 18 hp when traveling at a steady 88 km/h. a. What is the average retarding force exerted on the car? b. What are some things this force could be due to? 5. A shot putter accelerates a 7.3 kg shot from rest to 14 m/s. If this motion takes 1.5 sec, what average power was developed? 6. Does efficiency describe how fast work is done? Explain. 7. Does a more powerful machine always perform more work than a less powerful one? Explain
4 Worksheet 4: Momentum, Impulse, and Conservation of Energy Momentum and Impulse 1. A fast athlete, of mass 70. kg, can run at 10. m/s. At what speed would the following have the same momentum: a. A 20. g bullet? b. A 1500 kg car? 2. A 1.0x10 4 kg truck moves at 30. m/s. At what speed would a 1200 kg car have the same value of a. linear momentum? b. kinetic energy? 3. A ball of mass kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of m. What impulse was given to the ball by the floor? 4. A 0.10 kg ball is thrown straight up into the air with an initial speed of 15 m/s. Find the momentum of the ball a. at it s maximum height? b. halfway to its maximum height? 5. A pitcher claims he can throw a kg baseball with as much momentum as a 3.00 g bullet moving with a speed of 1500 m/s. a. What is the baseball s speed if the pitcher s claim is valid? b. Which has greater kinetic energy, the ball or the bullet? Explain. 6. A 3.0 kg steel ball strikes a massive wall at 10.0 m/s at an angle of 60. o with the plane of the wall. If bounces off the wall with the same speed and angle. If the ball is in contact with the wall for 0.20 s, what is the average force exerted by the wall on the ball? Conservation of Energy 7. A 20 kg child starts from rest and reaches 4 m/s at the bottom of a 20 o slide of length 4 m. What is the coefficient of kinetic friction? 8. A 60 g tennis ball thrown vertically up at 24 m/s rises to a maximum height of 26 m. What was the work done by resistive forces? 9. A 0.30 kg block is pushed against a spring (k = 8 N/m) thereby compressing it by 24 cm. After it is released the lock travels a total distance of 52 cm before coming to rest. What is the coefficient of kinetic friction for the surface? 10. A 2 kg block starts from rest at an initial height of 40 cm and slides down a frictionless circular ramp. It slides for 83 cm on the horizontal surface before coming to a stop. What is the coefficient of kinetic friction?
5 Worksheet 5: Playing with Momentum 1. Kim holds a 2.0 kg air rifle loosely and fires a bullet of mass 1.0 g. The muzzle velocity of the bullet is 150 m/s. a. What is the recoil speed of the gun? b. Now the girl, with a mass of 48 kg, holds the gun tightly against her body. What is the new recoil speed? c. Why is this speed so much less then before? 2. An astronaut of mass 80. kg caries an empty oxygen tank of mass 10. Kg. He throws the tank away from himself with a speed of 2.0 m/s. With what speed does he start to move off into space? 3. In a freight yard, a train is being put together from freight cars. An empty freight car, coasting at 10. m/s strikes a loaded car that is stationary, and the cars couple (stick) together. Each of the cars has a mass of 3.0 x 10 3 kg when empty, and the loaded car contains 12,000 kg of canned soda (a year s supply for the physics class). Which what speed does the combination of the two cars move? 4. A tennis player returns a 30. m/s serve straight back at 25 m/s after making contact with the ball for 0.50 sec. If the ball has a mass of 0.20 kg, what is the force she exerted on the ball? 5. Two students are fighting with snowballs. Each throws a snowball in such a way that the two balls collide inelastically. Snowball A is 1.0 kg and snowball B is 7.0 x 10 2 g. Each snowball has a speed of 12 m/s. What is the speed and direction of the combined snow mass? 6. As the snowball fight continues, one 70. kg student launches the other 70. kg student across the frozen frictionless pond at 8.0 m/s towards a tree on the other side. The sliding student goes through a snowman which reduces his speed to 3.0 m/s. a. What is the change in momentum for the sliding student? b. If it takes the student 0.30 seconds to go through the snowman, what is the average force applied by the snowman? c. If it takes just 0.10 seconds to stop at the tree, what is the average force experienced by the previously sliding student? 7. One of the student s mom sees them fighting and tells them to hug and say they are sorry. Student A skating at 5.0 m/s east is caught in a bear hug by student B who is skating 8.0 m/s north. a. What is the final velocity and direction of the hugging students? b. Together the two boys slide 4.2 m before coming to a rest. What is the coefficient of friction of the ice?
6 Worksheet 6: Mixed Review  Energy & Momentum 1. A 150g baseball reaches a batter with a speed of 25 m/s. After it has been struck, it leaves the bat at 35 m/s in the opposite direction. If the ball was in contact with the bat for.001 s, find the average force exerted on it during this period. (9 kn) 2. A 30.0 kg girl who is running at 3.0 m/s jumps on a stationary 10.0 kg sled on a frozen lake. How fast does the sled then move? (2.3 m/s) 3. A 0.5 kg stone moving north at 4 m/s collides with a 4 kg lump of clay moving west at 1 m/s. The stone becomes embedded in the clay. What is the velocity of the composite body after the collision? (1 m/s) 4. A 1.0 kg block, starting from 5.0 m high slides without friction down the slope as shown. At the bottom, it collides inelastically with a 5.0 kg block that is initially at rest. To what height (h) will the two block combo slide up the slope? (0.14m) 5m h 5. A kg bullet traveling at 300. m/s hits a 5.0 kg block of wood and becomes imbedded in the block. The block then slides without friction into a spring. If the spring is compressed.25 m, calculate its spring constant. (65,000 N/m) 6. A 20.0 kg block moving at 5.0 m/s hits a stationary 5.0 kg bock. The stick together and hit a spring with a spring constant of 200. N/m. How far is the spring compressed? (1.4 m) 7. A 5.0 kg football hits is caught by a 55 kg kid. Knocked off balanced by the catch, the kid then falls and slides down a frictionless 1.0 m tall hill. At the bottom of the hill, the kid slides 1.4 m on the pavement, where the coefficient of kinetic friction is How fast was the football initially thrown? (12m/s; answers may vary depending on rounding) 8. A 20. kg crate at rest on a 10. m high ramp, requires a 100. J push to get it moving down the ramp. The ramp and crate experience 20. J of friction. What is the kinetic energy of the block at the bottom of the ramp? (2.0x10 3 J) 9. A worker pulls a 40.0kg crate with a rope at the 30.0 o angle to the horizontal. The coefficient of sliding friction between the crate and the floor is If he moves the crate with a constant velocity a distance of 7.00 m, how much work does the worker do on the crate? (1150J) 10. A 35 g superball hits a wall at 10.0 m/s. If bounces off the wall with a speed of 8.0 m/s and the ball is in contact with the wall for 0.20 s, what is the average force exerted by the wall on the ball? (3.2 N) 11. A 2.5 kg block starts from rest at an initial height of 35 cm and slides down a frictionless circular ramp. It slides for 83 cm on a horizontal frictionfilled surface before coming to a stop. What is the coefficient of kinetic friction? (0.42) 12. A 70. kg skier is pulled 60. m up a 30. degree frictionless slope at 2.0 m/s. How much work is done & what is the power of the motor? (21,000 J; 690 W)
Physics 125 Practice Exam #3 Chapters 67 Professor Siegel
Physics 125 Practice Exam #3 Chapters 67 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 information9. 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 informationChapter 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 informationAP 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 informationF 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 250N force is directed horizontally as shown to push a 29kg box up an inclined plane at a constant speed. Determine the magnitude of the normal force,
More information10.1 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 informationP211 Midterm 2 Spring 2004 Form D
1. An archer pulls his bow string back 0.4 m by exerting a force that increases uniformly from zero to 230 N. The equivalent spring constant of the bow is: A. 115 N/m B. 575 N/m C. 1150 N/m D. 287.5 N/m
More informationAP 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 informationPHY231 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 informationB) 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 informationAP physics C Web Review Ch 6 Momentum
Name: Class: _ Date: _ AP physics C Web Review Ch 6 Momentum Please do not write on my tests Multiple Choice Identify the choice that best completes the statement or answers the question. 1. The dimensional
More informationWork, Energy and Power Practice Test 1
Name: ate: 1. How much work is required to lift a 2kilogram 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 informationPHY231 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 informationSHORT 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 informationExam 2 is at 7 pm tomorrow Conflict is at 5:15 pm in 151 Loomis
* By request, but I m not vouching for these since I didn t write them Exam 2 is at 7 pm tomorrow Conflict is at 5:15 pm in 151 Loomis There are extra office hours today & tomorrow Lots of practice exams
More informationSupplemental Questions
Supplemental Questions The fastest of all fishes is the sailfish. If a sailfish accelerates at a rate of 14 (km/hr)/sec [fwd] for 4.7 s from its initial velocity of 42 km/h [fwd], what is its final velocity?
More informationPhysics: 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 buckleup? A) the first law
More informationWorkEnergy Bar Charts
Name: WorkEnergy Bar Charts Read from Lesson 2 of the Work, Energy and Power chapter at The Physics Classroom: http://www.physicsclassroom.com/class/energy/u5l2c.html MOP Connection: Work and Energy:
More informationMULTIPLE 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 informationWork, Energy and Power
Work, Energy and Power In this section of the Transport unit, we will look at the energy changes that take place when a force acts upon an object. Energy can t be created or destroyed, it can only be changed
More informationChapter 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 informationPhysics 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 informationTennessee State University
Tennessee State University Dept. of Physics & Mathematics PHYS 2010 CF SU 2009 Name 30% Time is 2 hours. Cheating will give you an Fgrade. Other instructions will be given in the Hall. MULTIPLE CHOICE.
More informationC 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 informationChapter 6 Work and Energy
Chapter 6 WORK AND ENERGY PREVIEW Work is the scalar product of the force acting on an object and the displacement through which it acts. When work is done on or by a system, the energy of that system
More informationCHAPTER 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 informationReview Chapters 2, 3, 4, 5
Review Chapters 2, 3, 4, 5 4) The gain in speed each second for a freelyfalling 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 informationChapter 9. is gradually increased, does the center of mass shift toward or away from that particle or does it remain stationary.
Chapter 9 9.2 Figure 937 shows a three particle system with masses m 1 3.0 kg, m 2 4.0 kg, and m 3 8.0 kg. The scales are set by x s 2.0 m and y s 2.0 m. What are (a) the x coordinate and (b) the y coordinate
More informationCurso20122013 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 informationWORK DONE BY A CONSTANT FORCE
WORK DONE BY A CONSTANT FORCE The definition of work, W, when a constant force (F) is in the direction of displacement (d) is W = Fd SI unit is the Newtonmeter (Nm) = Joule, J If you exert a force of
More informationKE =? v o. Page 1 of 12
Page 1 of 12 CTEnergy1. 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 informationPhysics: Principles and Applications, 6e Giancoli Chapter 2 Describing Motion: Kinematics in One Dimension
Physics: Principles and Applications, 6e Giancoli Chapter 2 Describing Motion: Kinematics in One Dimension Conceptual Questions 1) Suppose that an object travels from one point in space to another. Make
More informationChapter 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 informationPhysics 1401  Exam 2 Chapter 5NNew
Physics 1401  Exam 2 Chapter 5NNew 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 informationExam Three Momentum Concept Questions
Exam Three Momentum Concept Questions Isolated Systems 4. A car accelerates from rest. In doing so the absolute value of the car's momentum changes by a certain amount and that of the Earth changes by:
More informationPHYS 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 informationUnit 3 Work and Energy Suggested Time: 25 Hours
Unit 3 Work and Energy Suggested Time: 25 Hours PHYSICS 2204 CURRICULUM GUIDE 55 DYNAMICS Work and Energy Introduction When two or more objects are considered at once, a system is involved. To make sense
More information8. 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 informationChapter 7 Momentum and Impulse
Chapter 7 Momentum and Impulse Collisions! How can we describe the change in velocities of colliding football players, or balls colliding with bats?! How does a strong force applied for a very short time
More information8. Potential Energy and Conservation of Energy Potential Energy: When an object has potential to have work done on it, it is said to have potential
8. Potential Energy and Conservation of Energy Potential Energy: When an object has potential to have work done on it, it is said to have potential energy, e.g. a ball in your hand has more potential energy
More informationTEACHER ANSWER KEY November 12, 2003. Phys  Vectors 11132003
Phys  Vectors 11132003 TEACHER ANSWER KEY November 12, 2003 5 1. A 1.5kilogram lab cart is accelerated uniformly from rest to a speed of 2.0 meters per second in 0.50 second. What is the magnitude
More informationPhysics 11 Assignment KEY Dynamics Chapters 4 & 5
Physics Assignment KEY Dynamics Chapters 4 & 5 ote: for all dynamics problemsolving questions, draw appropriate free body diagrams and use the aforementioned problemsolving method.. Define the following
More informationLecture 07: Work and Kinetic Energy. Physics 2210 Fall Semester 2014
Lecture 07: Work and Kinetic Energy Physics 2210 Fall Semester 2014 Announcements Schedule next few weeks: 9/08 Unit 3 9/10 Unit 4 9/15 Unit 5 (guest lecturer) 9/17 Unit 6 (guest lecturer) 9/22 Unit 7,
More informationWORKSHEET: KINETIC AND POTENTIAL ENERGY PROBLEMS
WORKSHEET: KINETIC AND POTENTIAL ENERGY PROBLEMS 1. Stored energy or energy due to position is known as Potential energy. 2. The formula for calculating potential energy is mgh. 3. The three factors that
More informationConservative vs. Nonconservative forces Gravitational Potential Energy. Work done by nonconservative forces and changes in mechanical energy
Next topic Conservative vs. Nonconservative forces Gravitational Potential Energy Mechanical Energy Conservation of Mechanical energy Work done by nonconservative forces and changes in mechanical energy
More informationEDUH 1017  SPORTS MECHANICS
4277(a) Semester 2, 2011 Page 1 of 9 THE UNIVERSITY OF SYDNEY EDUH 1017  SPORTS MECHANICS NOVEMBER 2011 Time allowed: TWO Hours Total marks: 90 MARKS INSTRUCTIONS All questions are to be answered. Use
More informationBHS 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 (15641642): 1 st true scientist and 1 st person to use
More informationLab 8: Ballistic Pendulum
Lab 8: Ballistic Pendulum Equipment: Ballistic pendulum apparatus, 2 meter ruler, 30 cm ruler, blank paper, carbon paper, masking tape, scale. Caution In this experiment a steel ball is projected horizontally
More informationSteps to Solving Newtons Laws Problems.
Mathematical Analysis With Newtons Laws similar to projectiles (x y) isolation Steps to Solving Newtons Laws Problems. 1) FBD 2) Axis 3) Components 4) Fnet (x) (y) 5) Subs 1 Visual Samples F 4 1) F 3 F
More informationAP 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 informationProblem Set #8 Solutions
MASSACHUSETTS INSTITUTE OF TECHNOLOGY Physics Department 8.01L: Physics I November 7, 2015 Prof. Alan Guth Problem Set #8 Solutions Due by 11:00 am on Friday, November 6 in the bins at the intersection
More informationName Period WORKSHEET: KINETIC AND POTENTIAL ENERGY PROBLEMS. 1. Stored energy or energy due to position is known as energy.
Name Period Date WORKSHEET: KINETIC AND POTENTIAL ENERGY PROBLEMS 1. Stored energy or energy due to position is known as energy. 2. The formula for calculating potential energy is. 3. The three factors
More informationChapter 9. particle is increased.
Chapter 9 9. Figure 936 shows a three particle system. What are (a) the x coordinate and (b) the y coordinate of the center of mass of the three particle system. (c) What happens to the center of mass
More informationWeb review  Ch 3 motion in two dimensions practice test
Name: Class: _ Date: _ Web review  Ch 3 motion in two dimensions practice test Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Which type of quantity
More informationKinetic Energy (A) stays the same stays the same (B) increases increases (C) stays the same increases (D) increases stays the same.
1. A cart full of water travels horizontally on a frictionless track with initial velocity v. As shown in the diagram, in the back wall of the cart there is a small opening near the bottom of the wall
More informationWork, Power, Energy Multiple Choice. PSI Physics. Multiple Choice Questions
Work, Power, Energy Multiple Choice PSI Physics Name Multiple Choice Questions 1. A block of mass m is pulled over a distance d by an applied force F which is directed in parallel to the displacement.
More informationMULTIPLE 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. Solve the problem. (Use g = 9.8 m/s2.) 1) A 21 kg box must be slid across the floor. If
More informationChapter 3 Falling Objects and Projectile Motion
Chapter 3 Falling Objects and Projectile Motion Gravity influences motion in a particular way. How does a dropped object behave?!does the object accelerate, or is the speed constant?!do two objects behave
More informationWork Energy & Power. September 2000 Number 05. 1. Work If a force acts on a body and causes it to move, then the force is doing work.
PhysicsFactsheet September 2000 Number 05 Work Energy & Power 1. Work If a force acts on a body and causes it to move, then the force is doing work. W = Fs W = work done (J) F = force applied (N) s = distance
More informationChapter #7 Giancoli 6th edition Problem Solutions
Chapter #7 Giancoli 6th edition Problem Solutions ü Problem #8 QUESTION: A 9300 kg boxcar traveling at 5.0 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 6.0 m/s.
More informationcircular 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 informationProblem Set 1. Ans: a = 1.74 m/s 2, t = 4.80 s
Problem Set 1 1.1 A bicyclist starts from rest and after traveling along a straight path a distance of 20 m reaches a speed of 30 km/h. Determine her constant acceleration. How long does it take her to
More informationChapter 7 WORK, ENERGY, AND Power Work Done by a Constant Force Kinetic Energy and the WorkEnergy Theorem Work Done by a Variable Force Power
Chapter 7 WORK, ENERGY, AND Power Work Done by a Constant Force Kinetic Energy and the WorkEnergy Theorem Work Done by a Variable Force Power Examples of work. (a) The work done by the force F on this
More informationPractice TEST 2. Explain your reasoning
Practice TEST 2 1. Imagine taking an elevator ride from the1 st floor to the 10 th floor of a building. While moving between the 1 st and 2 nd floors the elevator speeds up, but then moves at a constant
More informationUNIT 2 GCSE PHYSICS 2.2.1 Forces and Energy 2011 FXA WORK DONE (J) = ENERGY TRANSFERRED (J) WORK
29 When a force causes an object to move through a distance, work is done. Work done, force and distance are related by the equation : W = F x d WORK When a force is applied to an object and cause it to
More informationSpeed A B C. Time. Chapter 3: Falling Objects and Projectile Motion
Chapter 3: Falling Objects and Projectile Motion 1. Neglecting friction, if a Cadillac and Volkswagen start rolling down a hill together, the heavier Cadillac will get to the bottom A. before the Volkswagen.
More informationFriction and Gravity. Friction. Section 2. The Causes of Friction
Section 2 Friction and Gravity What happens when you jump on a sled on the side of a snowcovered hill? Without actually doing this, you can predict that the sled will slide down the hill. Now think about
More informationMomentum & Energy Extra Study Questions
Momentum & Energy Extra Study Questions Short Answer 1. What is the momentum of a 1000 kg car moving at 15 m/s [E]? 2. Calculate the momentum of each of the following objects. (a) a 0.50 kg ball thrown
More informationLAB 6  GRAVITATIONAL AND PASSIVE FORCES
L061 Name Date Partners LAB 6  GRAVITATIONAL AND PASSIVE FORCES OBJECTIVES And thus Nature will be very conformable to herself and very simple, performing all the great Motions of the heavenly Bodies
More informationResistance in the Mechanical System. Overview
Overview 1. What is resistance? A force that opposes motion 2. In the mechanical system, what are two common forms of resistance? friction and drag 3. What is friction? resistance that is produced when
More informationPHYS 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 informationName: Partners: Period: Coaster Option: 1. In the space below, make a sketch of your roller coaster.
1. In the space below, make a sketch of your roller coaster. 2. On your sketch, label different areas of acceleration. Put a next to an area of negative acceleration, a + next to an area of positive acceleration,
More informationACTIVITY BASED PHYSICS
ACTIVITY BASED PHYSICS MECHANICS PRACTICE PROBLEM SETS SOUTHINGTON HIGH SCHOOL CCP PHYSICS MECHANICS PRACTICE PROBLEM SET TABLE OF CONTENTS UNIT 2 KINEMATICS... 6 2.1 One Dimensional Motion... 6 2.2 Freefall...
More informationIII. Applications of Force and Motion Concepts. Concept Review. Conflicting Contentions. 1. Airplane Drop 2. Moving Ball Toss 3. Galileo s Argument
III. Applications of Force and Motion Concepts Concept Review Conflicting Contentions 1. Airplane Drop 2. Moving Ball Toss 3. Galileo s Argument Qualitative Reasoning 1. Dropping Balls 2. Spinning Bug
More informationA uranium nucleus (at rest) undergoes fission and splits into two fragments, one heavy and the other light. Which fragment has the greater speed?
A uranium nucleus (at rest) undergoes fission and splits into two fragments, one heavy and the other light. Which fragment has the greater speed? 1 2 PHYS 1021: Chap. 9, Pg 2 Page 1 1 A uranium nucleus
More informationHW Set VI page 1 of 9 PHYSICS 1401 (1) homework solutions
HW Set VI page 1 of 9 1030 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. 1033 ). The bullet emerges from the
More information3 Work, Power and Energy
3 Work, Power and Energy At the end of this section you should be able to: a. describe potential energy as energy due to position and derive potential energy as mgh b. describe kinetic energy as energy
More informationPractice final for Basic Physics spring 2005 answers on the last page Name: Date:
Practice final for Basic Physics spring 2005 answers on the last page Name: Date: 1. A 12 ohm resistor and a 24 ohm resistor are connected in series in a circuit with a 6.0 volt battery. Assuming negligible
More informationLAB 6: GRAVITATIONAL AND PASSIVE FORCES
55 Name Date Partners LAB 6: GRAVITATIONAL AND PASSIVE FORCES And thus Nature will be very conformable to herself and very simple, performing all the great Motions of the heavenly Bodies by the attraction
More informationConceptual 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 informationPhysics 201 Homework 8
Physics 201 Homework 8 Feb 27, 2013 1. A ceiling fan is turned on and a net torque of 1.8 Nm is applied to the blades. 8.2 rad/s 2 The blades have a total moment of inertia of 0.22 kgm 2. What is the
More informationAt the skate park on the ramp
At the skate park on the ramp 1 On the ramp When a cart rolls down a ramp, it begins at rest, but starts moving downward upon release covers more distance each second When a cart rolls up a ramp, it rises
More informationACTIVITY BASED PHYSICS
ACTIVITY BASED PHYSICS MECHANICS PRACTICE PROBLEM SETS SOUTHINGTON HIGH SCHOOL CCP PHYSICS MECHANICS PRACTICE PROBLEM SET TABLE OF CONTENTS UNIT 2 KINEMATICS... 6 2.1 One Dimensional Motion... 6 2.2 Freefall...
More information2008 FXA DERIVING THE EQUATIONS OF MOTION 1. Candidates should be able to :
Candidates should be able to : Derive the equations of motion for constant acceleration in a straight line from a velocitytime graph. Select and use the equations of motion for constant acceleration in
More informationExercises on Work, Energy, and Momentum. A B = 20(10)cos98 A B 28
Exercises on Work, Energy, and Momentum Exercise 1.1 Consider the following two vectors: A : magnitude 20, direction 37 North of East B : magnitude 10, direction 45 North of West Find the scalar product
More informationLesson 3  Understanding Energy (with a Pendulum)
Lesson 3  Understanding Energy (with a Pendulum) Introduction This lesson is meant to introduce energy and conservation of energy and is a continuation of the fundamentals of roller coaster engineering.
More informationWorksheet #1 Free Body or Force diagrams
Worksheet #1 Free Body or Force diagrams Drawing FreeBody Diagrams Freebody diagrams are diagrams used to show the relative magnitude and direction of all forces acting upon an object in a given situation.
More informationDynamics Extra Study Questions Short Answer
Dynamics Extra Study Questions Short Answer 1. An object with a mass of 15 kg rests on a frictionless horizontal plane and is acted upon by a horizontal force of 30 N. (a) What is its acceleration? (b)
More informationChapter 6. Work and Energy
Chapter 6 Work and Energy ENERGY IS THE ABILITY TO DO WORK = TO APPLY A FORCE OVER A DISTANCE= Example: push over a distance, pull over a distance. Mechanical energy comes into 2 forms: Kinetic energy
More informationPhysics Section 3.2 Free Fall
Physics Section 3.2 Free Fall Aristotle Aristotle taught that the substances making up the Earth were different from the substance making up the heavens. He also taught that dynamics (the branch of physics
More informationforce (mass)(acceleration) or F ma The unbalanced force is called the net force, or resultant of all the forces acting on the system.
4 Forces 41 Forces and Acceleration Vocabulary Force: A push or a pull. When an unbalanced force is exerted on an object, the object accelerates in the direction of the force. The acceleration is proportional
More informationProjectile Motion 1:Horizontally Launched Projectiles
A cannon shoots a clown directly upward with a speed of 20 m/s. What height will the clown reach? How much time will the clown spend in the air? Projectile Motion 1:Horizontally Launched Projectiles Two
More informationReview Assessment: Lec 02 Quiz
COURSES > PHYSICS GUEST SITE > CONTROL PANEL > 1ST SEM. QUIZZES > REVIEW ASSESSMENT: LEC 02 QUIZ Review Assessment: Lec 02 Quiz Name: Status : Score: Instructions: Lec 02 Quiz Completed 20 out of 100 points
More informationv v ax v a x a v a v = = = Since F = ma, it follows that a = F/m. The mass of the arrow is unchanged, and ( )
Week 3 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 informationExam 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 informationForce Concept Inventory
Revised form 081695R Force Concept Inventory Originally published in The Physics Teacher, March 1992 by David Hestenes, Malcolm Wells, and Gregg Swackhamer Revised August 1995 by Ibrahim Halloun, Richard
More informationWork. Work = Force x parallel distance (parallel component of displacement) F v
Work Work = orce x parallel distance (parallel component of displacement) W k = d parallel d parallel Units: N m= J = " joules" = ( kg m2/ s2) = average force computed over the distance r r When is not
More informationPhysics 590 Homework, Week 6 Week 6, Homework 1
Physics 590 Homework, Week 6 Week 6, Homework 1 Prob. 6.1.1 A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 35 m/s. At the same time it has a horizontal
More informationAP Physics C. Oscillations/SHM Review Packet
AP Physics C Oscillations/SHM Review Packet 1. A 0.5 kg mass on a spring has a displacement as a function of time given by the equation x(t) = 0.8Cos(πt). Find the following: a. The time for one complete
More information