D) No, because of the way work is defined D) remains constant at zero. D) 0 J D) zero
|
|
- Victor Mills
- 5 years ago
- Views:
Transcription
1 CHAPTER 6 REVIEW NAME 1) Can work be done on a system if there is no motion? A) Yes, if an outside force is provided. B) Yes, since motion is only relative. C) No, since a system which is not moving has no energy. D) No, because of the way work is defined. Diff: 1 Type: BI Var: 1 Page Ref: Sec ) If you push twice as hard against a stationary brick wall, the amount of work you do A) doubles. B) is cut in half. C) remains constant but non-zero. D) remains constant at zero. Diff: 1 Type: BI Var: 1 Page Ref: Sec ) A 50-N object was lifted 2.0 m vertically and is being held there. How much work is being done in holding the box in this position? A) more than 100 J B) 100 J C) less than 100 J, but more than 0 J D) 0 J Diff: 2 Type: BI Var: 1 Page Ref: Sec ) If you walk 5.0 m horizontally forward at a constant velocity carrying a 10-N object, the amount of work you do is A) more than 50 J. B) equal to 50 J. C) less than 50 J, but more than 0 J. D) zero. Diff: 2 Type: BI Var: 1 Page Ref: Sec ) Does the centripetal force acting on an object do work on the object? A) Yes, since a force acts and the object moves, and work is force times distance. B) Yes, since it takes energy to turn an object. C) No, because the object has constant speed. D) No, because the force and the displacement of the object are perpendicular. Diff: 2 Type: BI Var: 1 Page Ref: Sec ) You throw a ball straight up. Compare the sign of the work done by gravity while the ball goes up with the sign of the work done by gravity while it goes down. A) Work is + on the way up and + on the way down. B) Work is + on the way up and - on the way down. C) Work is - on the way up and + on the way down. D) Work is - on the way up and - on the way down. Answer: C Diff: 1 Type: BI Var: 1 Page Ref: Sec. 6.1
2 6) The area under the curve, on a Force versus position (F vs. x) graph, represents A) work. B) kinetic energy. C) power. D) potential energy. Diff: 1 Type: BI Var: 1 Page Ref: Sec ) The quantity 1/2 mv2 is A) the kinetic energy of the object. B) the potential energy of the object. C) the work done on the object by the force. 8) If the net work done on an object is positive, then the object's kinetic energy A) decreases. B) remains the same. C) increases. D) is zero. Answer: C 9) If the net work done on an object is negative, then the object's kinetic energy A) decreases. B) remains the same. C) increases. D) is zero. 10) If the net work done on an object is zero, then the object's kinetic energy A) decreases. B) remains the same. C) increases. D) is zero. 11) An object hits a wall and bounces back with half of its original speed. What is the ratio of the final kinetic energy to the initial kinetic energy? A) 1/2 B) 1/4 C) 2 D) 4 Diff: 2 Type: BI Var: 1 Page Ref: Sec ) You slam on the brakes of your car in a panic, and skid a certain distance on a straight, level road. If you had been traveling twice as fast, what distance would the car have skidded, under the same conditions? A) It would have skidded 4 times farther. B) It would have skidded twice as far. C) It would have skidded 1.4 times farther.
3 D) It is impossible to tell from the information given. Diff: 2 Type: BI Var: 1 Page Ref: Sec ) A planet of constant mass orbits the Sun in an elliptical orbit. Neglecting any friction effects, what happens to the planet's kinetic energy? A) It remains constant. B) It increases continually. C) It decreases continually. D) It increases when the planet approaches the Sun, and decreases when it moves farther away. Diff: 2 Type: BI Var: 1 Page Ref: Sec ) The quantity mgy is A) the kinetic energy of the object. B) the gravitational potential energy of the object. C) the work done on the object by the force. Diff: 1 Type: BI Var: 1 Page Ref: Sec ) The quantity 1/2 kx2 is A) the kinetic energy of the object. B) the elastic potential energy of the object. C) the work done on the object by the force. Diff: 1 Type: BI Var: 1 Page Ref: Sec ) An acorn falls from a tree. Compare its kinetic energy K, to its potential energy U. A) K increases and U decreases. B) K decreases and U decreases. C) K increases and U increases. D) K decreases and U increases. Diff: 1 Type: BI Var: 1 Page Ref: Sec ) A ball falls from the top of a building, through the air (air friction is not present), to the ground below. How does the kinetic energy (K) just before striking the ground compare to the potential energy (U) at the top of the building? A) K is equal to U. B) K is greater than U. C) K is less than U. D) It is impossible to tell. Diff: 2 Type: BI Var: 1 Page Ref: Sec ) A ball falls from the top of a building, through the air (air friction is present), to the ground below. How does the kinetic energy (K) just before striking the ground compare to the potential energy (U) at the top of the building? A) K is equal to U. B) K is greater than U. C) K is less than U. D) It is impossible to tell. Answer: C
4 19) The quantity Fd/t is 20) A 500-kg elevator is pulled upward with a constant force of 5500 N for a distance of 50.0 m. What is the work done by the 5500 N force? A) J (W=Fd cosθ=f. d) 21) A 500-kg elevator is pulled upward with a constant force of 5500 N for a distance of 50.0 m. What is the work done by the weight of the elevator? B) J (W=F. d=mgh) 22) A 4.00-kg box of fruit slides 8.0 m down a ramp, inclined at 30.0 from the horizontal. If the box slides at a constant velocity of 5.00 m/s, what is the work done by the weight of the box? A) 157 J (W =F. d, F= F x= mgsinθ, d=8) ) or (W=Fd cosθ, F=mg, θ=90-30, d=8) 23) A horizontal force of 200 N is applied to move a 55-kg cart (initially at rest) across a 10 m level surface. What is the final kinetic energy of the cart? B) J (ΣW=ΔKE= F. d) 24) A horizontal force of 200 N is applied to move a 55-kg cart (initially at rest) across a 10 m level surface. What is the final speed of the cart? C) 8.5 m/s (ΣW=ΔKE= F. d=½mv 2 ) 25) A 10-kg mass is moving with a speed of 5.0 m/s. How much work is required to stop the mass? D) 125 J (ΣW=ΔKE=½mv 2 ) 26) A spring-driven dart gun propels a 10-g dart. It is cocked by exerting a force of 20 N over a distance of 5.0 cm. With what speed will the dart leave the gun, assuming the spring has negligible mass? B) 14 m/s (ΣW=ΔKE= F. d=½mv 2 ) 27) An arrow of mass 20 g is shot horizontally into a bale of hay, striking the hay with a velocity of 60 m/s. It penetrates a depth of 20 cm before stopping. What is the average stopping force acting on the arrow? C) 180 N (F. d=½mv 2 ) (ΣW=ΔKE) 28) A 400-N box is pushed up an inclined plane. The plane is 4.0 m long and rises 2.0 m. If the plane is frictionless, how much work was done by the push? B) 800 J (mgh) (ΣW =GPE) 29) A spring is characterized by a spring constant of 60 N/m. How much potential energy does it store, when stretched by 1.0 cm? A) J (½kx 2 =EPE)
5 30) A 60-kg skier starts from rest from the top of a 50-m high slope. What is the speed of the slier on reaching the bottom of the slope? (Neglect friction.) B) 31 m/s (½mv 2 =mgh) (ΔKE=GPE) FIGURE ) A roller coaster starts from rest at a point 45 m above the bottom of a dip (See Fig. 6-2). Neglect friction, what will be the speed of the roller coaster at the top of the next slope, which is 30 m above the bottom of the dip? B) 17 m/s (½mv 2 =mgδh) (ΔKE=ΔGPE) 32) What is the minimum speed of the ball at the bottom of its swing (point B) in order for it to reach point A, which is 1.0-m above the bottom of the swing? FIGURE 6-3 C) 4.4 m/s (½mv 2 =mgδh) (ΔKE=ΔGPE) 33) A 1500-kg car moving at 25 m/s hits an initially uncompressed horizontal spring with spring constant of N/m. What is the maximum compression of the spring? (Neglect the mass of the spring.) D) 0.68 m (½mv 2 =½kx 2 ΔKE =EPE)
6 34) A 60-kg skier starts from rest from the top of a 50-m high slope. If the work done by friction is J, what is the speed of the skier on reaching the bottom of the slope? C) 28 m/s (ΣW=ΔKE) (ΣW=mgh-W f= ½mv 2 ) 35) At what rate is a 60.0-kg boy using energy when he runs up a flight of stairs 10.0-m high, in 8.00 s? B) 735 W (P=W/t=mgh/t) 36) A 10-N force is needed to move an object with a constant velocity of 5.0 m/s. What power must be delivered to the object by the force? C) 50 W P=W/t=Fv 37) A 1500-kg car accelerates from 0 to 25 m/s in 7.0 s. What is the average power delivered by the engine? (1 hp = 746 W) D) 90 hp (P=W/t) (ΣW=ΔKE½mv 2 )
Exam #2, Chapters 5-7 PHYS 101-4M MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Exam #2, Chapters 5-7 Name PHYS 101-4M MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The quantity 1/2 mv2 is A) the potential energy of the object.
More informationHomework #5. Ph 231 Introductory Physics, Sp-03 Page 1 of 4
Homework #. Ph Introductory Physics, Sp-0 Page of -A. A 7 kg block moves in a straight line under the influence of a force that varies with position as shown in the figure at the right. If the force is
More informationAP Physics 1 Work Energy and Power Practice Test Name
AP Physics 1 Work Energy and Power Practice Test Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Two objects, one of mass m and the other
More informationName 09-MAR-04. Work Power and Energy
Page 1 of 16 Work Power and Energy Name 09-MAR-04 1. A spring has a spring constant of 120 newtons/meter. How much potential energy is stored in the spring as it is stretched 0.20 meter? 1. 2.4 J 3. 12
More information1 1. A spring has a spring constant of 120 newtons/meter. How much potential energy is stored in the spring as it is stretched 0.20 meter?
Page of 3 Work Power And Energy TEACHER ANSWER KEY March 09, 200. A spring has a spring constant of 20 newtons/meter. How much potential energy is stored in the spring as it is stretched 0.20 meter?. 2.
More information23. A snowmobile pulls a trailer with a force of 450 N while moving at a constant velocity of 15 m/s. How much work is done by the snowmobile in 28 s?
Physics 04 Unit Review (June 013) 1. Which represents the rate of work done? (A) efficiency (B) force (C) power (D) work. In which situation is work done on a box? (A) The box is at rest on a table. (B)
More informationQuestion 8.1 Sign of the Energy II
Question 8. Sign of the Energy II Is it possible for the gravitational potential energy of an object to be negative? a) yes b) no Question 8. Sign of the Energy II Is it possible for the gravitational
More informationEnergy Problem Solving Techniques.
1 Energy Problem Solving Techniques www.njctl.org 2 Table of Contents Introduction Gravitational Potential Energy Problem Solving GPE, KE and EPE Problem Solving Conservation of Energy Problem Solving
More informationChapter 6 Energy and Oscillations
Chapter 6 Energy and Oscillations Conservation of Energy In this chapter we will discuss one of the most important and fundamental principles in the universe. Energy is conserved. This means that in any
More informationPSI AP Physics I Work and Energy
PSI AP Physics I Work and Energy Multiple-Choice questions 1. A driver in a 2000 kg Porsche wishes to pass a slow moving school bus on a 4 lane road. What is the average power in watts required to accelerate
More informationAP Physics C - Mechanics
Slide 1 / 84 Slide 2 / 84 P Physics C - Mechanics Energy Problem Solving Techniques 2015-12-03 www.njctl.org Table of Contents Slide 3 / 84 Introduction Gravitational Potential Energy Problem Solving GPE,
More informationPHYSICS - CLUTCH CH 07: WORK & ENERGY.
!! www.clutchprep.com INTRO TO ENERGY & ENERGY FORMS ENERGY: A physical quantity without a precise definition. We don't know exactly WHAT it is, but we know HOW it works. - Energy "exists" in many forms;
More informationReview. Kinetic Energy Work Hooke s s Law Potential Energy Conservation of Energy Power 1/91
Review Kinetic Energy Work Hooke s s Law Potential Energy Conservation of Energy Power 1/91 The unit of work is the A. Newton B. Watt C. Joule D. Meter E. Second 2/91 The unit of work is the A. Newton
More informationWEP-Energy. 2. If the speed of a car is doubled, the kinetic energy of the car is 1. quadrupled 2. quartered 3. doubled 4. halved
1. A 1-kilogram rock is dropped from a cliff 90 meters high. After falling 20 meters, the kinetic energy of the rock is approximately 1. 20 J 2. 200 J 3. 700 J 4. 900 J 2. If the speed of a car is doubled,
More informationSlide 1 / 76. Work & Energy Multiple Choice Problems
Slide 1 / 76 Work & Energy Multiple Choice Problems Slide 2 / 76 1 A driver in a 2000 kg Porsche wishes to pass a slow moving school bus on a 4 lane road. What is the average power in watts required to
More informationMomentum, Impulse, Work, Energy, Power, and Conservation Laws
Momentum, Impulse, Work, Energy, Power, and Conservation Laws 1. Cart A has a mass of 2 kilograms and a speed of 3 meters per second. Cart B has a mass of 3 kilograms and a speed of 2 meters per second.
More informationPhys101 Lectures 9 and 10 Conservation of Mechanical Energy
Phys101 Lectures 9 and 10 Conservation of Mechanical Energy Key points: Conservative and Nonconservative Forces Potential Energy Generalized work-energy principle Mechanical Energy and Its Conservation
More information2 possibilities. 2.) Work is done and... 1.) Work is done and... *** The function of work is to change energy ***
Work-Energy Theorem and Energy Conservation *** The function of work is to change energy *** 2 possibilities 1.) Work is done and... or 2.) Work is done and... 1 EX: A 100 N box is 10 m above the ground
More informationCPS lesson Work and Energy ANSWER KEY
CPS lesson Work and Energy ANSWER KEY 1. A ball feeder slowly pushes a bowling ball up a 1-m ramp to a height of 0.5 m above the floor. Neglecting friction, what constant force must be exerted on the 5-kg
More informationPhysics 1A, Summer 2011, Summer Session 1 Quiz 3, Version A 1
Physics 1A, Summer 2011, Summer Session 1 Quiz 3, Version A 1 Closed book and closed notes. No work needs to be shown. 1. Three rocks are thrown with identical speeds from the top of the same building.
More informationThe diagram below shows a block on a horizontal frictionless surface. A 100.-newton force acts on the block at an angle of 30. above the horizontal.
Name: 1) 2) 3) Two students are pushing a car. What should be the angle of each student's arms with respect to the flat ground to maximize the horizontal component of the force? A) 90 B) 0 C) 30 D) 45
More informationToday: Work, Kinetic Energy, Potential Energy. No Recitation Quiz this week
Today: Work, Kinetic Energy, Potential Energy HW #4 due Thursday, 11:59 p.m. pm No Recitation Quiz this week 1 What is Energy? Mechanical Electromagnetic PHY 11 PHY 13 Chemical CHE 105 Nuclear PHY 555
More informationConservation of Energy and Momentum
Conservation of Energy and Momentum Three criteria for Work There must be a force. There must be a displacement, d. The force must have a component parallel to the displacement. Work, W = F x d, W = Fd
More informationPHYS 101 Previous Exam Problems. Kinetic Energy and
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 informationWork and Energy Chapter Questions. 2. Contrast the effects of external forces and internal forces on the total energy of a system.
PSI AP Physics I Work and Energy Chapter Questions 1. Define a system, the environment and the system boundary. 2. Contrast the effects of external forces and internal forces on the total energy of a system.
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. 1) You are standing in a moving bus, facing forward, and you suddenly fall forward as the
More informationPhys101 Lectures 9 and 10 Conservation of Mechanical Energy
Phys101 Lectures 9 and 10 Conservation of Mechanical Energy Key points: Conservative and Nonconservative Forces Potential Energy Generalized work-energy principle Mechanical Energy and Its Conservation
More informationMomentum, Impulse, Work, Energy, Power, and Conservation Laws
Momentum, Impulse, Work, Energy, Power, and Conservation Laws 1. Cart A has a mass of 2 kilograms and a speed of 3 meters per second. Cart B has a mass of 3 kilograms and a speed of 2 meters per second.
More informationName. Honors Physics AND POTENTIAL KINETIC
KINETIC Name Honors Physics AND POTENTIAL Name Period Work and Energy Intro questions Read chapter 9 pages 144 146 (Section 9.1) 1. Define work in terms of physics? 2. In order to do work on an object,
More information16. A ball is thrown straight up with an initial speed of 30 m/s. What is its speed after 4.2 s? a. 11 m/s b. 30 m/s c. 42 m/s d.
Page 1 1. If you are driving 90 km/h along a straight road and you look to the side for 3.0 s, how far do you travel during this inattentive period? a. 30 m b. 25 m c. 50 m d. 75 m 2. A polar bear starts
More informationPhysics 110 Homework Solutions Week #5
Physics 110 Homework Solutions Week #5 Wednesday, October 7, 009 Chapter 5 5.1 C 5. A 5.8 B 5.34. A crate on a ramp a) x F N 15 F 30 o mg Along the x-axis we that F net = ma = Fcos15 mgsin30 = 500 cos15
More informationEnergy Conservation AP
Energy Conservation AP Manicouagan Reservoir seen from space shuttle; formed almost 1 million years ago when a large meteorite hit Earth Earth did work on meteorite to change its kinetic energy energy
More information(A) 10 m (B) 20 m (C) 25 m (D) 30 m (E) 40 m
PSI AP Physics C Work and Energy (Algebra Based) Multiple Choice Questions (use g = 10 m/s 2 ) 1. A student throws a ball upwards from the ground level where gravitational potential energy is zero. At
More information2. What would happen to his acceleration if his speed were half? Energy The ability to do work
1. A 40 kilogram boy is traveling around a carousel with radius 0.5 meters at a constant speed of 1.7 meters per second. Calculate his centripetal acceleration. 2. What would happen to his acceleration
More informationA. B. C. D. E. v x. ΣF x
Q4.3 The graph to the right shows the velocity of an object as a function of time. Which of the graphs below best shows the net force versus time for this object? 0 v x t ΣF x ΣF x ΣF x ΣF x ΣF x 0 t 0
More informationPhysics 20 Practice Problems for Exam 1 Fall 2014
Physics 20 Practice Problems for Exam 1 Fall 2014 Multiple Choice Short Questions (1 pt ea.) Circle the best answer. 1. An apple falls from a tree and hits the ground 5 meters below. It hits the ground
More informationHonor Physics Final Exam Review. What is the difference between series, parallel, and combination circuits?
Name Period Date Honor Physics Final Exam Review Circuits You should be able to: Calculate the total (net) resistance of a circuit. Calculate current in individual resistors and the total circuit current.
More information(f ) From the graph, obtain the height of the tube given the mass of the dart is 20 grams and the constant force applied in the tube is 2 newtons.
1. Bowling Ball A is dropped from a point halfway up a cliff. A second identical bowling ball, B, is dropped simultaneously from the top of the cliff. Comparing the bowling balls at the instant they reach
More informationAP1 WEP. Answer: E. The final velocities of the balls are given by v = 2gh.
1. Bowling Ball A is dropped from a point halfway up a cliff. A second identical bowling ball, B, is dropped simultaneously from the top of the cliff. Comparing the bowling balls at the instant they reach
More informationBase your answers to questions 5 and 6 on the information below.
1. A car travels 90. meters due north in 15 seconds. Then the car turns around and travels 40. meters due south in 5.0 seconds. What is the magnitude of the average velocity of the car during this 20.-second
More informationPeriod: Date: Review - UCM & Energy. Page 1. 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 below. The diagram shows the top view of a -kilogram student at point A on an amusement park ride. The ride spins the student in a
More information1. A train moves at a constant velocity of 90 km/h. How far will it move in 0.25 h? A. 10 km B km C. 25 km D. 45 km E. 50 km
Name: Physics I Mid Term Exam Review Multiple Choice Questions Date: Mr. Tiesler 1. A train moves at a constant velocity of 90 km/h. How far will it move in 0.25 h? A. 10 km B. 22.5 km C. 25 km D. 45 km
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Common Quiz Mistakes / Practice for Final Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A ball is thrown directly upward and experiences
More informationEnergy Whiteboard Problems
Energy Whiteboard Problems 1. (a) Consider an object that is thrown vertically up into the air. Draw a graph of gravitational force vs. height for that object. (b) Based on your experience with the formula
More information1. A sphere with a radius of 1.7 cm has a volume of: A) m 3 B) m 3 C) m 3 D) 0.11 m 3 E) 21 m 3
1. A sphere with a radius of 1.7 cm has a volume of: A) 2.1 10 5 m 3 B) 9.1 10 4 m 3 C) 3.6 10 3 m 3 D) 0.11 m 3 E) 21 m 3 2. A 25-N crate slides down a frictionless incline that is 25 above the horizontal.
More information4) Vector = and vector = What is vector = +? A) B) C) D) E)
1) Suppose that an object is moving with constant nonzero acceleration. Which of the following is an accurate statement concerning its motion? A) In equal times its speed changes by equal amounts. B) In
More informationPhysics Worksheet Work and Energy Section: Name:
1. oncept of Energy a) Energy: quantity that is often understood as the on a physical system. b) We observe only the effects of energy when something is happening. When energy is being, or when energy
More informationName: Date: Period: AP Physics C Work HO11
Name: Date: Period: AP Physics C Work HO11 1.) Rat pushes a 25.0 kg crate a distance of 6.0 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction
More information(A) 10 m (B) 20 m (C) 25 m (D) 30 m (E) 40 m
Work/nergy 1. student throws a ball upward where the initial potential energy is 0. t a height of 15 meters the ball has a potential energy of 60 joules and is moving upward with a kinetic energy of 40
More informationWork Energy Review. 1. Base your answer to the following question on the information and diagram below and on your knowledge of physics.
Name: ate: 1. ase your answer to the following question on the information and diagram below and on your knowledge of physics. student pushes a box, weighing 50. newtons, 6.0 meters up an incline at a
More information= 1 2 kx2 dw =! F! d! r = Fdr cosθ. T.E. initial. = T.E. Final. = P.E. final. + K.E. initial. + P.E. initial. K.E. initial =
Practice Template K.E. = 1 2 mv2 P.E. height = mgh P.E. spring = 1 2 kx2 dw =! F! d! r = Fdr cosθ Energy Conservation T.E. initial = T.E. Final (1) Isolated system P.E. initial (2) Energy added E added
More information( ) = ( ) W net = ΔKE = KE f KE i W F. F d x. KE = 1 2 mv2. Note: Work is the dot product of F and d. Work-Kinetic Energy Theorem
Work-Kinetic Energy Theorem KE = 1 2 mv2 W F change in the kinetic energy of an object F d x net work done on the particle ( ) = ( ) W net = ΔKE = KE f KE i Note: Work is the dot product of F and d W g
More informationS15--AP Q1 Work and Energy PRACTICE
Name: Class: Date: S15--AP Q1 Work and Energy PRACTICE Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Rupel pushes a box 5.00 m by applying a 25.0-N horizontal
More informationPractice Test for Midterm Exam
A.P. Physics Practice Test for Midterm Exam Kinematics 1. Which of the following statements are about uniformly accelerated motion? Select two answers. a) If an object s acceleration is constant then it
More informationWEP-Energy. 2. If the speed of a car is doubled, the kinetic energy of the car is 1. quadrupled 2. quartered 3. doubled 4. halved
1. A 1-kilogram rock is dropped from a cliff 90 meters high. After falling 20 meters, the kinetic energy of the rock is approximately 1. 20 J 2. 200 J 3. 700 J 4. 900 J 2. If the speed of a car is doubled,
More information(D) Based on Ft = m v, doubling the mass would require twice the time for same momentum change
1. A car of mass m, traveling at speed v, stops in time t when maximum braking force is applied. Assuming the braking force is independent of mass, what time would be required to stop a car of mass m traveling
More informationGeneral Physics I Work & Energy
General Physics I Work & Energy Forms of Energy Kinetic: Energy of motion. A car on the highway has kinetic energy. We have to remove this energy to stop it. The brakes of a car get HOT! This is an example
More informationDepartment of Natural Sciences Clayton College & State University. Physics 1111 Quiz 5. a. Calculate the work done by each force on the crate.
Clayton College & State University October, 00 Physics 1111 Quiz 5 Name SOLUTION A crate of 50.0 kg mass containing a new lab instrument is dragged by enthusiastic physics students a distance of 30.0 m
More informationRegents Physics. Physics Midterm Review - Multiple Choice Problems
Name Physics Midterm Review - Multiple Choice Problems Regents Physics 1. A car traveling on a straight road at 15.0 meters per second accelerates uniformly to a speed of 21.0 meters per second in 12.0
More informationBeginning of a paper by Gottfried Wilhelm von Leibnitz and his followers denouncing the Law of Conservation of Momentum.
AP Physics Energy and its Conservation Part I Introduction: Energy is a term that most of us take for granted and use quite freely. We assume we know what we are talking about when speaking of energy.
More informationCHAPTER 6: IN AN ISOLATED SYSTEM, ENERGY IS TRANSFERRED FROM ONE OBJECT TO ANOTHER WHENEVER WORK IS DONE
CHAPTER 6: IN AN ISOLATED SYSTEM, ENERGY IS TRANSFERRED FROM ONE OBJECT TO ANOTHER WHENEVER WORK IS DONE 6.1 Work and Energy In science, work is done when a force acts over a displacement; energy is transferred.
More informationPage 1. Name: 1) If a man walks 17 meters east then 17 meters south, the magnitude of the man's displacement is A) 34 m B) 30.
Name: 1) If a man walks 17 meters east then 17 meters south, the magnitude of the man's displacement is 34 m 30. m 17 m 24 m 2) The graph below represents the motion of a body that is moving with 6) Which
More informationConcepTest PowerPoints
ConcepTest PowerPoints Chapter 6 Physics: Principles with Applications, 6 th edition Giancoli 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for
More informationThe work-energy theorem
The work-energy theorem Objectives Investigate quantities using the work-energy theorem in various situations. Calculate quantities using the work-energy theorem in various situations. Design and implement
More informationPhysics Midterm Review KEY
Name: Date: 1. Which quantities are scalar? A. speed and work B. velocity and force C. distance and acceleration D. momentum and power 2. A 160.-kilogram space vehicle is traveling along a straight line
More informationCHAPTER 5. Chapter 5, Energy
CHAPTER 5 2. A very light cart holding a 300-N box is moved at constant velocity across a 15-m level surface. What is the net work done in the process? a. zero b. 1/20 J c. 20 J d. 2 000 J 4. An rock is
More informationPhysics Test Review: Mechanics Session: Name:
Directions: For each statement or question, write in the answer box, the number of the word or expression that, of those given, best completes the statement or answers the question. 1. The diagram below
More informations_3x03 Page 1 Physics Samples
Physics Samples KE, PE, Springs 1. A 1.0-kilogram rubber ball traveling east at 4.0 meters per second hits a wall and bounces back toward the west at 2.0 meters per second. Compared to the kinetic energy
More informationENERGY. Conservative Forces Non-Conservative Forces Conservation of Mechanical Energy Power
ENERGY Conservative Forces Non-Conservative Forces Conservation of Mechanical Energy Power Conservative Forces A force is conservative if the work it does on an object moving between two points is independent
More informationOld Exam. Question Chapter 7 072
Old Exam. Question Chapter 7 072 Q1.Fig 1 shows a simple pendulum, consisting of a ball of mass M = 0.50 kg, attached to one end of a massless string of length L = 1.5 m. The other end is fixed. If the
More informationPSI AP Physics B Dynamics
PSI AP Physics B Dynamics Multiple-Choice questions 1. After firing a cannon ball, the cannon moves in the opposite direction from the ball. This an example of: A. Newton s First Law B. Newton s Second
More informationWork Done by a Constant Force
Work and Energy Work Done by a Constant Force In physics, work is described by what is accomplished when a force acts on an object, and the object moves through a distance. The work done by a constant
More informationIn this lecture we will discuss three topics: conservation of energy, friction, and uniform circular motion.
1 PHYS:100 LECTURE 9 MECHANICS (8) In this lecture we will discuss three topics: conservation of energy, friction, and uniform circular motion. 9 1. Conservation of Energy. Energy is one of the most fundamental
More information3/10/2019. What Is a Force? What Is a Force? Tactics: Drawing Force Vectors
What Is a Force? A force acts on an object. A force requires an agent, something that acts on the object. If you throw a ball, your hand is the agent or cause of the force exerted on the ball. A force
More informationSlide 1 / 76. Slide 2 / 76. Slide 3 / 76. Work & Energy Multiple Choice Problems A 1,800 B 5,000 E 300,000. A Fdcos θ - μ mgd B Fdcos θ.
Slide 1 / 76 Work & nergy Multiple hoice Problems 1 driver in a 2000 kg Porsche wishes to pass a slow moving school bus on a 4 lane road. What is the average power in watts required to accelerate the sports
More informationPotential Energy & Conservation of Energy
PHYS 101 Previous Exam Problems CHAPTER 8 Potential Energy & Conservation of Energy Potential energy Conservation of energy conservative forces Conservation of energy friction Conservation of energy external
More informationConservative vs. Non-conservative forces Gravitational Potential Energy. Conservation of Mechanical energy
Next topic Conservative vs. Non-conservative forces Gravitational Potential Energy Mechanical Energy Conservation of Mechanical energy Work done by non-conservative forces and changes in mechanical energy
More informationWork done on an object = energy gained by the object Work done by an object = energy lost by the object
Energy Energy can be defined as the capacity for doing work, or the property of a system that diminishes when the system does work on any other system by an amount equal to the work done. 1) When work
More informationW = F x W = Fx cosθ W = Fx. Work
Ch 7 Energy & Work Work Work is a quantity that is useful in describing how objects interact with other objects. Work done by an agent exerting a constant force on an object is the product of the component
More informationLecture 10 Mechanical Energy Conservation; Power
Potential energy Basic energy Lecture 10 Mechanical Energy Conservation; Power ACT: Zero net work The system of pulleys shown below is used to lift a bag of mass M at constant speed a distance h from the
More informationRELEASED. Go to next page. 2. The graph shows the acceleration of a car over time.
1. n object is launched across a room. How can a student determine the average horizontal velocity of the object using a meter stick and a calculator? The student can calculate the object s initial potential
More informationi. Indicate on the figure the point P at which the maximum speed of the car is attained. ii. Calculate the value vmax of this maximum speed.
1. A 0.20 kg object moves along a straight line. The net force acting on the object varies with the object's displacement as shown in the graph above. The object starts from rest at displacement x = 0
More informationWhat Is a Force? Slide Pearson Education, Inc.
What Is a Force? A force acts on an object. A force requires an agent, something that acts on the object. If you throw a ball, your hand is the agent or cause of the force exerted on the ball. A force
More informationSometimes (like on AP test) you will see the equation like this:
Work, Energy & Momentum Notes Chapter 5 & 6 The two types of energy we will be working with in this unit are: (K in book KE): Energy associated with of an object. (U in book PE): Energy associated with
More informationLectures Chapter 6 (Cutnell & Johnson, Physics 7 th edition)
PH 201-4A spring 2007 Work and Energy Lectures 16-17 Chapter 6 (Cutnell & Johnson, Physics 7 th edition) 1 Work and Energy: Work done by a constant force Constant pushing force F pointing in the same direction
More informationCh 11 ENERGY and its CONSERVATION. work causes a change in the energy of a system KE (an increase or decrease in KE) ket.
Ch 11 ENERGY and its CONSERVATION 11.1 The Many Forms of Energy work causes a change in the energy of a system W = KE (an increase or decrease in KE) work energy theorem object + work object work increase
More informationWritten Homework problems. Spring (taken from Giancoli, 4 th edition)
Written Homework problems. Spring 014. (taken from Giancoli, 4 th edition) HW1. Ch1. 19, 47 19. Determine the conversion factor between (a) km / h and mi / h, (b) m / s and ft / s, and (c) km / h and m
More informationChapter 8 Conservation of Energy. Copyright 2009 Pearson Education, Inc.
Chapter 8 Conservation of Energy Units of Chapter 8 Conservative and Nonconservative Forces Potential Energy Mechanical Energy and Its Conservation Problem Solving Using Conservation of Mechanical Energy
More informationPhysics 23 Exam 2 March 3, 2009
Use the following to answer question 1: A stationary 4-kg shell explodes into three pieces. Two of the fragments have a mass of 1 kg each and move along the paths shown with a speed of 10 m/s. The third
More informationWS-CH-4 Motion and Force Show all your work and equations used. Isaac Newton ( )
AP PHYSICS 1 WS-CH-4 Motion and Force Show all your work and equations used. Isaac Newton (1643-1727) Isaac Newton was the greatest English mathematician of his generation. He laid the foundation for differential
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A baseball is thrown vertically upward and feels no air resistance. As it is rising A) both
More informationCurso 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 informationPotential Energy and Conservation of Energy Chap. 7 & 8
Level : AP Physics Potential Energy and Conservation of Energy Chap. 7 & 8 Potential Energy of a System see p.191 in the textbook - Potential energy is the energy associated with the arrangement of a system
More informationCh 8 Conservation of Energy
Ch 8 Conservation of Energy Cons. of Energy It has been determined, through experimentation, that the total mechanical energy of a system remains constant in any isolated system of objects that interact
More informationAnswer: mgr You get the same answer regardless of where you set the zero of height.
Page 1 of 10 CTEnergy-1. A mass m is at the end of light (massless) rod of length R, the other end of which has a frictionless pivot so the rod can swing in a vertical plane. The rod is initially horizontal
More informationName: Class: Date: so sliding friction is better so sliding friction is better d. µ k
Name: Class: Date: Exam 2--PHYS 101-F08 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. You put your book on the seat next to you. When the bus stops,
More informationPotential energy and conservation of energy
Chapter 8 Potential energy and conservation of energy Copyright 8.1_2 Potential Energy and Work Potential energy U is energy that can be associated with the configuration (arrangement) of a system of objects
More informationRecall: Gravitational Potential Energy
Welcome back to Physics 15 Today s agenda: Work Power Physics 15 Spring 017 Lecture 10-1 1 Recall: Gravitational Potential Energy For an object of mass m near the surface of the earth: U g = mgh h is height
More informationSlide 1 / A train moves at a constant velocity of 90 km/h. How far will it move in 0.25 h? 10 km 22.5 km 25 km 45 km 50 km
Slide 1 / 96 1 train moves at a constant velocity of 90 km/h. How far will it move in 0.25 h? 10 km 22.5 km 25 km 45 km 50 km Slide 2 / 96 2 bicyclist moves at a constant speed of 6 m/s. How long it will
More information3. How long must a 100 N net force act to produce a change in momentum of 200 kg m/s? (A) 0.25 s (B) 0.50 s (C) 1.0 s (D) 2.0 s (E) 4.
AP Physics Multiple Choice Practice Momentum and Impulse 1. A car of mass m, traveling at speed v, stops in time t when maximum braking force is applied. Assuming the braking force is independent of mass,
More information