PH201 Chapter 5 Solutions

Size: px
Start display at page:

Download "PH201 Chapter 5 Solutions"

Transcription

1 PH201 Chapter 5 Solutions 5.4. Set Up: For each object use coordinates where +y is upward. Each object has Call the objects 1 and 2, with and Solve: (a) The free-body diagrams for each object are shown in the figure below. and are replaced by their x and y components. (b) For object 2, and (c) For object 2, so 5.8. Set Up: For each muscle where Use coordinates where +y is along the Achilles tendon. The force exerted by each muscle then makes an angle of with the +y axis. Apply the equilibrium conditions to the point where the muscles attach to the tendon. The free-body diagram is given in the figure below. T is the tension in the tendon. Solve:

2 5.9. Set Up: Use coordinates where +y is upward and +x is to the right. The force at the foot is horizontal. The tension T in the cable that has one end attached to the leg and the other end attached to the weight is equal to W and is the same everywhere along the cable. Solve: (a) The free-body diagram for the leg is given in Figure (a) below. is the traction force on the leg. and so (b) The free-body diagram for the pulley that is attached to the foot is given in Figure (b) above. Reflect: The tractive force on the leg is greater than W. *5.15. Set Up: Apply to each block. Take +y perpendicular to the incline and +x parallel to the incline. Solve: The free-body diagrams for each block, A and B, are given in the figure below. (a) For B, and (b) For block A, and (c) for each block (d) For and For and

3 *5.23. Set Up: Take +y to be upward. The fish has the same upward acceleration as the elevator. Let be the upward force exerted on the fish by the spring balance; F is what the balance reads. Solve: (a) The free-body diagram for the fish is sketched in the figure below. and The weight of the fish is (b) and from part (a). The elevator is accelerating downward with (d) If the cable breaks, and The elevator is in free-fall and the balance reads zero Set Up: In each free-body diagram take a positive coordinate direction to be the direction of the acceleration of the object. The box accelerates to the right and the bucket accelerates downward. Their accelerations have the same magnitude. The box has mass Solve: (a) The free-body diagram for the box and bucket are shown in the figure below. (b) applied to the box applied to the bucket Combining these two equations to eliminate T (c)

4 *5.29. Set Up: Let and The two boxes have the same magnitude of acceleration. For the 30.0 kg box let +y be downward and for the 50.0 kg box use coordinates parallel and perpendicular to the ramp, with up the ramp. Solve: (a) The free-body diagrams are given in the figure below. (b) The downward force on the 30.0 kg box is The force pulling the system in the opposite direction is the component of directed down the ramp, and the 30.0 kg box moves downward. Therefore, the 50.0 kg box moves up the ramp. (c) applied to applied to Combining these two equations to eliminate T The 50.0 kg box accelerates up the ramp at and the 30.0 kg box accelerates downward at Reflect: Only the component of the weight of the 50 kg box that is parallel to the ramp acts to oppose the weight of the 30 kg box. Therefore, the 30 kg box pulls the 50 kg box up the ramp even though its weight is less than the weight of the 50 kg box Set Up: Assume that the normal force n at each hip is vertical. Solve: (a) The free-body diagram for the upper body of the person is shown in the figure below. and

5 (b) (c) Set Up: Constant velocity means for each crate. Apply to each crate, with +x to the right. Solve: The free-body diagrams for each crate are shown in the figure below. (a) for each crate and and for A for B Adding these two equations (b) Set Up: Use the information about the motion to find the acceleration of the puck and then use to relate a to the friction force. Take +x to be in the direction the puck is moving. Solve: and The free-body diagram for the puck is given in the figure below. and

6 5.36. Set Up: Use to find the acceleration that can be given to the car by the kinetic friction force. Then use a constant acceleration equation. Take +x in the direction the car is moving. Solve: (a) The free-body diagram for the car is shown in the figure below. and Then and (b) *5.39. Set Up: For constant speed, Apply with in the direction of motion of the box. Solve: (a) The free-body diagram for the box is given in the figure below. and

7 (b) and Reflect: In (b) the friction force and the acceleration are directed opposite to the motion. Since and are in opposite directions, the box slows down Set Up: Once the crate has started to move, friction is kinetic. The free-body diagram for the crate is given in the figure below. is the force the worker applies. The crate has mass Solve: so The force F to get the box moving is After the box is moving, friction is and Set Up: Take +x to be down the incline. At the maximum angle, the static friction force has its maximum value, Solve: The free-body diagram for the patient is given in the figure below. and

8 5.48. Set Up: Use coordinates where is upward and is horizontal to the right. The applied force pushes to the left so the friction force is to the right. Solve: (a) The free-body diagram is given in the figure below. The applied force has been replaced by its x and y components.

9 (b) and (c) and (d) The maximum possible static friction force is (e) The vertical component of F is now upward. now Set Up: where F is the pull on the strip or the force the strip exerts. Solve: (a) so (b) Set Up: so Solve: (a) Yes, Hooke s law says and this is true here since the graph of F versus x is a straight line. (b) k is the slope of the graph of F versus x: (c) Set Up: The free-body diagrams are given in the figure below. There is a kinetic friction force Solve: (a) and so (b) so and and Set Up: The free-body diagram for one bowling ball is given in the figure below. The tension T has been resolved into its x and y components. n is the force the other ball exerts on this one.

10 Solve: (a) and (b) and Set Up: Constant speed means Use Newton s third law to relate forces on A and on B. Solve: (a) Treat A and B as a single object of weight The free-body diagram for this combined object is given in Figure (a) below. (b) The free-body force diagrams for blocks A and B are given in Figures (b) and (c) above. n and are the normal and friction forces applied to block B by the tabletop and are the same as in part (a). is the friction force that A applies to B. It is to the right because the force from A opposes the motion of B. is the downward force that A exerts on B. is the friction force that B applies to A. It is to the left because block B wants A to move with it. is the normal force that block B exerts on A. By Newton s third law, and these forces are in opposite directions. Also, and these forces are in opposite directions. for block A so and for block A for block B (c) In part (a) block A is at rest with respect to B and it has zero acceleration. There is no horizontal force on A besides friction, and the friction force on A is zero Set Up: The tension throughout the cable connected to W is the weight W of the hanging mass. The freebody diagram for the pulley connected to the feet is given in the figure below.

11 Solve: (a) to support the leg. and The mass of W is 44.7 kg. (b) The tractive force along the leg is *5.87. Set Up: The block has the same horizontal acceleration a as the cart. Let +x be to the right and +y be upward. To find the minimum acceleration required, set the static friction force equal to its maximum value, Solve: The free-body diagram for the block is given in the figure below. and Reflect: The smaller is the greater a must be to prevent slipping. Increasing a increases the normal force n and that increases the maximum for a given

12

Chapter 4. Forces and Newton s Laws of Motion. continued

Chapter 4. Forces and Newton s Laws of Motion. continued Chapter 4 Forces and Newton s Laws of Motion continued 4.9 Static and Kinetic Frictional Forces When an object is in contact with a surface forces can act on the objects. The component of this force acting

More information

Figure 5.1a, b IDENTIFY: Apply to the car. EXECUTE: gives.. EVALUATE: The force required is less than the weight of the car by the factor.

Figure 5.1a, b IDENTIFY: Apply to the car. EXECUTE: gives.. EVALUATE: The force required is less than the weight of the car by the factor. 51 IDENTIFY: for each object Apply to each weight and to the pulley SET UP: Take upward The pulley has negligible mass Let be the tension in the rope and let be the tension in the chain EXECUTE: (a) The

More information

PHYS 101 Previous Exam Problems. Force & Motion I

PHYS 101 Previous Exam Problems. Force & Motion I PHYS 101 Previous Exam Problems CHAPTER 5 Force & Motion I Newton s Laws Vertical motion Horizontal motion Mixed forces Contact forces Inclines General problems 1. A 5.0-kg block is lowered with a downward

More information

(a) On the dots below that represent the students, draw and label free-body diagrams showing the forces on Student A and on Student B.

(a) On the dots below that represent the students, draw and label free-body diagrams showing the forces on Student A and on Student B. 2003 B1. (15 points) A rope of negligible mass passes over a pulley of negligible mass attached to the ceiling, as shown above. One end of the rope is held by Student A of mass 70 kg, who is at rest on

More information

WS-CH-4 Motion and Force Show all your work and equations used. Isaac Newton ( )

WS-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 information

Circle the correct answer. For those questions involving calculations, working MUST be shown to receive credit.

Circle the correct answer. For those questions involving calculations, working MUST be shown to receive credit. Dynamics Assignment 3 Name: Multiple Choice. Circle the correct answer. For those questions involving calculations, working MUST be shown to receive credit. 1. Which statement is always true regarding

More information

You may use g = 10 m/s 2, sin 60 = 0.87, and cos 60 = 0.50.

You may use g = 10 m/s 2, sin 60 = 0.87, and cos 60 = 0.50. 1. A child pulls a 15kg sled containing a 5kg dog along a straight path on a horizontal surface. He exerts a force of a 55N on the sled at an angle of 20º above the horizontal. The coefficient of friction

More information

The Concept of Force Newton s First Law and Inertial Frames Mass Newton s Second Law The Gravitational Force and Weight Newton s Third Law Analysis

The Concept of Force Newton s First Law and Inertial Frames Mass Newton s Second Law The Gravitational Force and Weight Newton s Third Law Analysis The Laws of Motion The Concept of Force Newton s First Law and Inertial Frames Mass Newton s Second Law The Gravitational Force and Weight Newton s Third Law Analysis Models using Newton s Second Law Forces

More information

Review: Advanced Applications of Newton's Laws

Review: Advanced Applications of Newton's Laws Review: Advanced Applications of Newton's Laws 1. The free-body diagram of a wagon being pulled along a horizontal surface is best represented by a. A d. D b. B e. E c. C 2. The free-body diagram of a

More information

Physics B Newton s Laws AP Review Packet

Physics B Newton s Laws AP Review Packet Force A force is a push or pull on an object. Forces cause an object to accelerate To speed up To slow down To change direction Unit: Newton (SI system) Newton s First Law The Law of Inertia. A body in

More information

Chapter 4. Forces and Newton s Laws of Motion. continued

Chapter 4. Forces and Newton s Laws of Motion. continued Chapter 4 Forces and Newton s Laws of Motion continued Quiz 3 4.7 The Gravitational Force Newton s Law of Universal Gravitation Every particle in the universe exerts an attractive force on every other

More information

Dynamics; Newton s Laws of Motion

Dynamics; Newton s Laws of Motion Dynamics; Newton s Laws of Motion Force A force is any kind of push or pull on an object. An object at rest needs a force to get it moving; a moving object needs a force to change its velocity. The magnitude

More information

CHAPTER 4 TEST REVIEW -- Answer Key

CHAPTER 4 TEST REVIEW -- Answer Key AP PHYSICS Name: Period: Date: DEVIL PHYSICS BADDEST CLASS ON CAMPUS 50 Multiple Choice 45 Single Response 5 Multi-Response Free Response 3 Short Free Response 2 Long Free Response AP EXAM CHAPTER TEST

More information

Dynamics Notes 1 Newton s Laws

Dynamics Notes 1 Newton s Laws Dynamics Notes 1 Newton s Laws In 1665 Sir Isaac Newton formulated three laws that dictate the motion of objects. These three laws are universal and apply to all forces in the universe. Newton s 1 st Law:

More information

Force. The cause of an acceleration or change in an object s motion. Any kind of a push or pull on an object.

Force. The cause of an acceleration or change in an object s motion. Any kind of a push or pull on an object. Force The cause of an acceleration or change in an object s motion. Any kind of a push or pull on an object. Forces do not always give rise to motion. Forces can be equal and opposite. Force is a vector

More information

An Accelerating Hockey Puck

An Accelerating Hockey Puck Example 5.1 An Accelerating Hockey Puck A hockey puck having a mass of 0.30 kg slides on the frictionless, horizontal surface of an ice rink. Two hockey sticks strike the puck simultaneously, exerting

More information

Chapter Four Holt Physics. Forces and the Laws of Motion

Chapter Four Holt Physics. Forces and the Laws of Motion Chapter Four Holt Physics Forces and the Laws of Motion Physics Force and the study of dynamics 1.Forces - a. Force - a push or a pull. It can change the motion of an object; start or stop movement; and,

More information

Forces & Newton s Laws FR Practice Problems

Forces & Newton s Laws FR Practice Problems 1) A drag-racing car speeds up from rest to 22 m/s in 2 s. The car has mass 800 kg; the driver has mass 80 kg. a) Calculate the acceleration of the car. b) Calculate the net force on the car. c) Which

More information

CHAPTER 4 NEWTON S LAWS OF MOTION

CHAPTER 4 NEWTON S LAWS OF MOTION 62 CHAPTER 4 NEWTON S LAWS O MOTION CHAPTER 4 NEWTON S LAWS O MOTION 63 Up to now we have described the motion of particles using quantities like displacement, velocity and acceleration. These quantities

More information

Web practice Chapter 4 Newton's Laws of Motion

Web practice Chapter 4 Newton's Laws of Motion Name: Class: _ Date: _ Web practice Chapter 4 Newton's Laws of Motion Multiple Choice Identify the choice that best completes the statement or answers the question. 1. If we know an object is moving at

More information

iat is the minimum coe cient of static friction necessary to keep the top block from slipping on " % e bottom block?

iat is the minimum coe cient of static friction necessary to keep the top block from slipping on  % e bottom block? 1. Which one ofthe following terms is used to indicate the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line? A) force B) acceleration C) equilibrium

More information

Concept of Force and Newton s Laws of Motion

Concept of Force and Newton s Laws of Motion Concept of Force and Newton s Laws of Motion 8.01 W02D2 Chapter 7 Newton s Laws of Motion, Sections 7.1-7.4 Chapter 8 Applications of Newton s Second Law, Sections 8.1-8.4.1 Announcements W02D3 Reading

More information

Physics Lecture 12. P. Gutierrez. Department of Physics & Astronomy University of Oklahoma

Physics Lecture 12. P. Gutierrez. Department of Physics & Astronomy University of Oklahoma Physics 2514 Lecture 12 P. Gutierrez Department of Physics & Astronomy University of Oklahoma P. Gutierrez (University of Oklahoma) Physics 2514 February 21, 2011 1 / 13 Goal Goals for today s lecture:

More information

Student AP Physics 1 Date. Newton s Laws B FR

Student AP Physics 1 Date. Newton s Laws B FR Student AP Physics 1 Date Newton s Laws B FR #1 A block is at rest on a rough inclined plane and is connected to an object with the same mass as shown. The rope may be considered massless; and the pulley

More information

Physics 101 Lecture 5 Newton`s Laws

Physics 101 Lecture 5 Newton`s Laws Physics 101 Lecture 5 Newton`s Laws Dr. Ali ÖVGÜN EMU Physics Department The Laws of Motion q Newton s first law q Force q Mass q Newton s second law q Newton s third law qfrictional forces q Examples

More information

1. A 7.0-kg bowling ball experiences a net force of 5.0 N. What will be its acceleration? a. 35 m/s 2 c. 5.0 m/s 2 b. 7.0 m/s 2 d. 0.

1. A 7.0-kg bowling ball experiences a net force of 5.0 N. What will be its acceleration? a. 35 m/s 2 c. 5.0 m/s 2 b. 7.0 m/s 2 d. 0. Newton's Laws 1. A 7.0-kg bowling ball experiences a net force of 5.0 N. What will be its acceleration? a. 35 m/s 2 c. 5.0 m/s 2 b. 7.0 m/s 2 d. 0.71 m/s 2 2. An astronaut applies a force of 500 N to an

More information

EQUATIONS OF MOTION: RECTANGULAR COORDINATES

EQUATIONS OF MOTION: RECTANGULAR COORDINATES EQUATIONS OF MOTION: RECTANGULAR COORDINATES Today s Objectives: Students will be able to: 1. Apply Newton s second law to determine forces and accelerations for particles in rectilinear motion. In-Class

More information

Chapter 5. Force and Motion I

Chapter 5. Force and Motion I Chapter 5 Force and Motion I 5 Force and Motion I 25 October 2018 PHY101 Physics I Dr.Cem Özdoğan 2 3 5-2 Newtonian Mechanics A force is a push or pull acting on a object and causes acceleration. Mechanics

More information

Old Exam. Question Chapter 7 072

Old 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 information

General Physics I Spring Applying Newton s Laws

General Physics I Spring Applying Newton s Laws General Physics I Spring 2011 pplying Newton s Laws 1 Friction When you push horizontally on a heavy box at rest on a horizontal floor with a steadily increasing force, the box will remain at rest initially,

More information

Phys101 Lecture 5 Dynamics: Newton s Laws of Motion

Phys101 Lecture 5 Dynamics: Newton s Laws of Motion Phys101 Lecture 5 Dynamics: Newton s Laws of Motion Key points: Newton s second law is a vector equation Action and reaction are acting on different objects Free-Body Diagrams Ref: 4-1,2,3,4,5,6,7. Page

More information

1. 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) 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 information

Chapter 7 Newton s Third Law

Chapter 7 Newton s Third Law Chapter 7 Newton s Third Law Chapter Goal: To use Newton s third law to understand interacting objects. Slide 7-2 Chapter 7 Preview Slide 7-3 Chapter 7 Preview Slide 7-4 Chapter 7 Preview Slide 7-6 Chapter

More information

Concept of Force Concept Questions

Concept of Force Concept Questions Concept of Force Concept Questions Question 1: You are pushing a wooden crate across the floor at constant speed. You decide to turn the crate on end, reducing by half the surface area in contact with

More information

4) Vector = and vector = What is vector = +? A) B) C) D) E)

4) 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 information

variable Formula S or v SI variable Formula S or v SI 4. How is a Newton defined? What does a Newton equal in pounds?

variable Formula S or v SI variable Formula S or v SI 4. How is a Newton defined? What does a Newton equal in pounds? Newton s Laws 1 1. Define mass variable Formula S or v SI 2. Define inertia, how is inertia related to mass 3. What is a Force? variable Formula S or v SI 4. How is a Newton defined? What does a Newton

More information

Static and Kinetic Friction, Normals, Equilibrium and Accelerated Motion

Static and Kinetic Friction, Normals, Equilibrium and Accelerated Motion Static and Kinetic Friction, Normals, Equilibrium and Accelerated Motion 1. A baseball player slides into home base with an initial speed of 7.90 m/s. If the coefficient of kinetic friction between the

More information

Chapter 4 Force and Motion

Chapter 4 Force and Motion Chapter 4 Force and Motion Units of Chapter 4 The Concepts of Force and Net Force Inertia and Newton s First Law of Motion Newton s Second Law of Motion Newton s Third Law of Motion More on Newton s Laws:

More information

AP Physics 1: MIDTERM REVIEW OVER UNITS 2-4: KINEMATICS, DYNAMICS, FORCE & MOTION, WORK & POWER

AP Physics 1: MIDTERM REVIEW OVER UNITS 2-4: KINEMATICS, DYNAMICS, FORCE & MOTION, WORK & POWER MIDTERM REVIEW AP Physics 1 McNutt Name: Date: Period: AP Physics 1: MIDTERM REVIEW OVER UNITS 2-4: KINEMATICS, DYNAMICS, FORCE & MOTION, WORK & POWER 1.) A car starts from rest and uniformly accelerates

More information

March 10, P12 Inclined Planes.notebook. Physics 12. Inclined Planes. Push it Up Song

March 10, P12 Inclined Planes.notebook. Physics 12. Inclined Planes. Push it Up Song Physics 12 Inclined Planes Push it Up Song 1 Bell Work A box is pushed up a ramp at constant velocity. Draw a neatly labeled FBD showing all of the forces acting on the box. direction of motion θ F p F

More information

Physics 2A Chapter 4: Forces and Newton s Laws of Motion

Physics 2A Chapter 4: Forces and Newton s Laws of Motion Physics 2A Chapter 4: Forces and Newton s Laws of Motion There is nothing either good or bad, but thinking makes it so. William Shakespeare It s not what happens to you that determines how far you will

More information

NEWTON S LAWS OF MOTION (EQUATION OF MOTION) (Sections )

NEWTON S LAWS OF MOTION (EQUATION OF MOTION) (Sections ) NEWTON S LAWS OF MOTION (EQUATION OF MOTION) (Sections 13.1-13.3) Today s Objectives: Students will be able to: a) Write the equation of motion for an accelerating body. b) Draw the free-body and kinetic

More information

act concurrently on point P, as shown in the diagram. The equilibrant of F 1

act concurrently on point P, as shown in the diagram. The equilibrant of F 1 Page 1 of 10 force-friction-vectors review Name 12-NOV-04 1. A 150.-newton force, F1, and a 200.-newton force, F 2, are applied simultaneously to the same point on a large crate resting on a frictionless,

More information

General Physics I Spring Forces and Newton s Laws of Motion

General Physics I Spring Forces and Newton s Laws of Motion General Physics I Spring 2011 Forces and Newton s Laws of Motion 1 Forces and Interactions The central concept in understanding why things move is force. If a tractor pushes or pulls a trailer, the tractor

More information

Webreview practice test. Forces (again)

Webreview practice test. Forces (again) Please do not write on test. ID A Webreview 4.3 - practice test. Forces (again) Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A 5.0-kg mass is suspended

More information

PHYSICS 221, FALL 2009 EXAM #1 SOLUTIONS WEDNESDAY, SEPTEMBER 30, 2009

PHYSICS 221, FALL 2009 EXAM #1 SOLUTIONS WEDNESDAY, SEPTEMBER 30, 2009 PHYSICS 221, FALL 2009 EXAM #1 SOLUTIONS WEDNESDAY, SEPTEMBER 30, 2009 Note: The unit vectors in the +x, +y, and +z directions of a right-handed Cartesian coordinate system are î, ĵ, and ˆk, respectively.

More information

Forces and Newton s Laws Reading Notes. Give an example of a force you have experienced continuously all your life.

Forces and Newton s Laws Reading Notes. Give an example of a force you have experienced continuously all your life. Forces and Newton s Laws Reading Notes Name: Section 4-1: Force What is force? Give an example of a force you have experienced continuously all your life. Give an example of a situation where an object

More information

End-of-Chapter Exercises

End-of-Chapter Exercises End-of-Chapter Exercises For all these exercises, assume that all strings are massless and all pulleys are both massless and frictionless. We will improve our model and learn how to account for the mass

More information

Chapter 4: Newton's Laws of Motion

Chapter 4: Newton's Laws of Motion Chapter 4 Lecture Chapter 4: Newton's Laws of Motion Goals for Chapter 4 To understand force either directly or as the net force of multiple components. To study and apply Newton's first law. To study

More information

Reading Quiz. Chapter 5. Physics 111, Concordia College

Reading Quiz. Chapter 5. Physics 111, Concordia College Reading Quiz Chapter 5 1. The coefficient of static friction is A. smaller than the coefficient of kinetic friction. B. equal to the coefficient of kinetic friction. C. larger than the coefficient of kinetic

More information

AP Physics 1 Multiple Choice Questions - Chapter 4

AP Physics 1 Multiple Choice Questions - Chapter 4 1 Which of ewton's Three Laws of Motion is best expressed by the equation F=ma? a ewton's First Law b ewton's Second Law c ewton's Third Law d one of the above 4.1 2 A person is running on a track. Which

More information

2. If a net horizontal force of 175 N is applied to a bike whose mass is 43 kg what acceleration is produced?

2. If a net horizontal force of 175 N is applied to a bike whose mass is 43 kg what acceleration is produced? Chapter Problems Newton s 2nd Law: Class Work 1. A 0.40 kg toy car moves at constant acceleration of 2.3 m/s 2. Determine the net applied force that is responsible for that acceleration. 2. If a net horizontal

More information

Thursday February 8. Write these equations in your notes if they re not already there. You will want them for Exam 1 & the Final.

Thursday February 8. Write these equations in your notes if they re not already there. You will want them for Exam 1 & the Final. Assignment 4 due Friday like almost every Friday Pre-class due 15min before class like every class Help Room: Here, 6-9pm Wed/Thurs SI: Morton 222, M&W 7:15-8:45pm Office Hours: 204 EAL, 10-11am Wed or

More information

Force 10/01/2010. (Weight) MIDTERM on 10/06/10 7:15 to 9:15 pm Bentley 236. (Tension)

Force 10/01/2010. (Weight) MIDTERM on 10/06/10 7:15 to 9:15 pm Bentley 236. (Tension) Force 10/01/2010 = = Friction Force (Weight) (Tension), coefficient of static and kinetic friction MIDTERM on 10/06/10 7:15 to 9:15 pm Bentley 236 2008 midterm posted for practice. Help sessions Mo, Tu

More information

Physics 207 Lecture 7. Lecture 7

Physics 207 Lecture 7. Lecture 7 Lecture 7 "Professor Goddard does not know the relation between action and reaction and the need to have something better than a vacuum against which to react. He seems to lack the basic knowledge ladled

More information

Chapter 6: Work and Kinetic Energy

Chapter 6: Work and Kinetic Energy Chapter 6: Work and Kinetic Energy Suppose you want to find the final velocity of an object being acted on by a variable force. Newton s 2 nd law gives the differential equation (for 1D motion) dv dt =

More information

Practice. Newton s 3 Laws of Motion. Recall. Forces a push or pull acting on an object; a vector quantity measured in Newtons (kg m/s²)

Practice. Newton s 3 Laws of Motion. Recall. Forces a push or pull acting on an object; a vector quantity measured in Newtons (kg m/s²) Practice A car starts from rest and travels upwards along a straight road inclined at an angle of 5 from the horizontal. The length of the road is 450 m and the mass of the car is 800 kg. The speed of

More information

AP Physics 1 Review. On the axes below draw the horizontal force acting on this object as a function of time.

AP Physics 1 Review. On the axes below draw the horizontal force acting on this object as a function of time. P Physics Review. Shown is the velocity versus time graph for an object that is moving in one dimension under the (perhaps intermittent) action of a single horizontal force. Velocity, m/s Time, s On the

More information

Motor. Cable. Elevator

Motor. Cable. Elevator Q4.1 An elevator is being lifted at a constant speed by a steel cable attached to an electric motor. There is no air resistance, nor is there any friction between the elevator and the walls of the elevator

More information

PHYS 101 Previous Exam Problems. Kinetic Energy and

PHYS 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 information

AP Homework 4.1. Name: Date: Class Period:

AP Homework 4.1. Name: Date: Class Period: AP Homework 4.1 Name: Date: Class Period: (1) A 75.0-kg wrecking ball hangs from a uniform heavy-duty chain having a mass of 26.0 kg. (a) Find the maximum and minimum tension in the chain. (b) What is

More information

A Question about free-body diagrams

A Question about free-body diagrams Free-body Diagrams To help us understand why something moves as it does (or why it remains at rest) it is helpful to draw a free-body diagram. The free-body diagram shows the various forces that act on

More information

Q16.: A 5.0 kg block is lowered with a downward acceleration of 2.8 m/s 2 by means of a rope. The force of the block on the rope is:(35 N, down)

Q16.: A 5.0 kg block is lowered with a downward acceleration of 2.8 m/s 2 by means of a rope. The force of the block on the rope is:(35 N, down) Old Exam Question Ch. 5 T072 Q13.Two blocks of mass m 1 = 24.0 kg and m 2, respectively, are connected by a light string that passes over a massless pulley as shown in Fig. 2. If the tension in the string

More information

Physics 111: Mechanics Lecture 5

Physics 111: Mechanics Lecture 5 Physics 111: Mechanics Lecture 5 Bin Chen NJIT Physics Department Forces of Friction: f q When an object is in motion on a surface or through a viscous medium, there will be a resistance to the motion.

More information

AP Physics Free Response Practice Dynamics

AP Physics Free Response Practice Dynamics AP Physics Free Response Practice Dynamics 14) In the system shown above, the block of mass M 1 is on a rough horizontal table. The string that attaches it to the block of mass M 2 passes over a frictionless

More information

Review: Newton s Laws

Review: Newton s Laws More force was needed to stop the rock Review: Newton s Laws F r 1 F r F r 3 F r 4 2 Newton s First Law The velocity of an object does not change unless a force acts on the object Newton s Second Law:

More information

Topic: Force PHYSICS 231

Topic: Force PHYSICS 231 Topic: Force PHYSICS 231 Current Assignments Homework Set 2 due this Thursday, Jan 27, 11 pm Reading for next week: Chapters 10.1-6,10.10,8.3 2/1/11 Physics 231 Spring 2011 2 Key Concepts: Force Free body

More information

Physics for Scientists and Engineers. Chapter 6 Dynamics I: Motion Along a Line

Physics for Scientists and Engineers. Chapter 6 Dynamics I: Motion Along a Line Physics for Scientists and Engineers Chapter 6 Dynamics I: Motion Along a Line Spring, 008 Ho Jung Paik Applications of Newton s Law Objects can be modeled as particles Masses of strings or ropes are negligible

More information

Phys 111 Exam 1 September 22, 2015

Phys 111 Exam 1 September 22, 2015 Phys 111 Exam 1 September 22, 2015 1. The time T required for one complete oscillation of a mass m on a spring of force constant k is T = 2π m k. Find the dimension of k to be dimensionally correct for

More information

PHYSICS 231 Laws of motion PHY 231

PHYSICS 231 Laws of motion PHY 231 PHYSICS 231 Laws of motion 1 Newton s Laws First Law: If the net force exerted on an object is zero the object continues in its original state of motion; if it was at rest, it remains at rest. If it was

More information

A. B. C. D. E. v x. ΣF x

A. 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 information

Twentieth SLAPT Physics Contest Southern Illinois University Edwardsville April 30, Mechanics Test

Twentieth SLAPT Physics Contest Southern Illinois University Edwardsville April 30, Mechanics Test Twentieth SLAPT Physics Contest Southern Illinois University Edwardsville April 30, 2005 Mechanics Test Please answer the following questions on the supplied answer sheet. You may write on this test booklet,

More information

Name: Unit 4 Newton s 1 st & 3 rd Law

Name: Unit 4 Newton s 1 st & 3 rd Law Name: Period: Table #: Unit 4 Newton s 1 st & 3 rd Law 1 UNIT IV: Reading - Force Diagrams The analysis of a problem in dynamics usually involves the selection and analysis of the relevant forces acting

More information

Solution of HW4. and m 2

Solution of HW4. and m 2 Solution of HW4 9. REASONING AND SOLUION he magnitude of the gravitational force between any two of the particles is given by Newton's law of universal gravitation: F = Gm 1 m / r where m 1 and m are the

More information

Consider the case of a 100 N. mass on a horizontal surface as shown below:

Consider the case of a 100 N. mass on a horizontal surface as shown below: 1.9.1 Introduction The study of friction is called: The force of friction is defined as: The force of friction acting between two surfaces has three properties: i) ii) iii) Consider the case of a 100 N.

More information

Chapter 4. Forces and Mass. Classical Mechanics. Forces. Newton s First Law. Fundamental (Field) Forces. Contact and Field Forces

Chapter 4. Forces and Mass. Classical Mechanics. Forces. Newton s First Law. Fundamental (Field) Forces. Contact and Field Forces Chapter 4 Classical Mechanics Forces and Mass does not apply for very tiny objects (< atomic sizes) objects moving near the speed of light Newton s First Law Forces If the net force!f exerted on an object

More information

Study Questions/Problems Week 4

Study Questions/Problems Week 4 Study Questions/Problems Week 4 Chapter 6 treats many topics. I have selected on average less than three problems from each topic. I suggest you do them all. Likewise for the Conceptual Questions and exercises,

More information

Newton s First Law and IRFs

Newton s First Law and IRFs Goals: Physics 207, Lecture 6, Sept. 22 Recognize different types of forces and know how they act on an object in a particle representation Identify forces and draw a Free Body Diagram Solve 1D and 2D

More information

Applying Newton s Laws

Applying Newton s Laws Chapter 5 Applying Newton s Laws PowerPoint Lectures for University Physics, Thirteenth Edition Hugh D. Young and Roger A. Freedman Lectures by Wayne Anderson Copyright 2012 Pearson Education Inc. To use

More information

Chapter 3 The Laws of motion. The Laws of motion

Chapter 3 The Laws of motion. The Laws of motion Chapter 3 The Laws of motion The Laws of motion The Concept of Force. Newton s First Law. Newton s Second Law. Newton s Third Law. Some Applications of Newton s Laws. 1 5.1 The Concept of Force Force:

More information

Part A Atwood Machines Please try this link:

Part A Atwood Machines Please try this link: LAST NAME FIRST NAME DATE Assignment 2 Inclined Planes, Pulleys and Accelerating Fluids Problems 83, 108 & 109 (and some handouts) Part A Atwood Machines Please try this link: http://www.wiley.com/college/halliday/0470469080/simulations/sim20/sim20.html

More information

Previewer Tools Hide All

Previewer Tools Hide All Assignment Previewer Forces & Newton's Laws of Motion (496767) Previewer Tools Show All Hide All In View: Key Close this window Hidden: Assignment Score Mark Help/Hints Solution Show New Randomization

More information

AP Physics C: Mechanics Practice (Newton s Laws including friction, resistive forces, and centripetal force).

AP Physics C: Mechanics Practice (Newton s Laws including friction, resistive forces, and centripetal force). AP Physics C: Mechanics Practice (Newton s Laws including friction, resistive forces, and centripetal force). 1981M1. A block of mass m, acted on by a force of magnitude F directed horizontally to the

More information

Practice Test for Midterm Exam

Practice 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 information

PHYSICS. Chapter 7 Lecture FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E RANDALL D. KNIGHT Pearson Education, Inc.

PHYSICS. Chapter 7 Lecture FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E RANDALL D. KNIGHT Pearson Education, Inc. PHYSICS FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E Chapter 7 Lecture RANDALL D. KNIGHT Chapter 7 Newton s Third Law IN THIS CHAPTER, you will use Newton s third law to understand how objects

More information

Applying Newton s Laws

Applying Newton s Laws Chapter 5 Applying Newton s Laws PowerPoint Lectures for University Physics, Twelfth Edition Hugh D. Young and Roger A. Freedman Lectures by James Pazun Goals for Chapter 5 To use and apply Newton s Laws

More information

Circular Motion. A car is traveling around a curve at a steady 45 mph. Is the car accelerating? A. Yes B. No

Circular Motion. A car is traveling around a curve at a steady 45 mph. Is the car accelerating? A. Yes B. No Circular Motion A car is traveling around a curve at a steady 45 mph. Is the car accelerating? A. Yes B. No Circular Motion A car is traveling around a curve at a steady 45 mph. Which vector shows the

More information

This homework is extra credit!

This homework is extra credit! This homework is extra credit! 1 Translate (10 pts) 1. You are told that speed is defined by the relationship s = d /t, where s represents speed, d represents distance, and t represents time. State this

More information

PHYSICS 220 Lecture 04 Forces and Motion in 1 D Textbook Sections

PHYSICS 220 Lecture 04 Forces and Motion in 1 D Textbook Sections PHYSICS 220 Lecture 04 Forces and Motion in 1 D Textbook Sections 3.2 3.6 Lecture 4 Purdue University, Physics 220 1 Last Lecture Constant Acceleration x = x 0 + v 0 t + ½ at 2 v = v 0 + at Overview v

More information

Review PHYS114 Chapters 4-7

Review PHYS114 Chapters 4-7 Review PHYS114 Chapters 4-7 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A 27 kg object is accelerated at a rate of 1.7 m/s 2. What force does

More information

MOMENTUM, IMPULSE & MOMENTS

MOMENTUM, IMPULSE & MOMENTS the Further Mathematics network www.fmnetwork.org.uk V 07 1 3 REVISION SHEET MECHANICS 1 MOMENTUM, IMPULSE & MOMENTS The main ideas are AQA Momentum If an object of mass m has velocity v, then the momentum

More information

HSC PHYSICS ONLINE B F BA. repulsion between two negatively charged objects. attraction between a negative charge and a positive charge

HSC PHYSICS ONLINE B F BA. repulsion between two negatively charged objects. attraction between a negative charge and a positive charge HSC PHYSICS ONLINE DYNAMICS TYPES O ORCES Electrostatic force (force mediated by a field - long range: action at a distance) the attractive or repulsion between two stationary charged objects. AB A B BA

More information

Phys101-T121-First Major Exam Zero Version, choice A is the correct answer

Phys101-T121-First Major Exam Zero Version, choice A is the correct answer Phys101-T121-First Major Exam Zero Version, choice A is the correct answer Q1. Find the mass of a solid cylinder of copper with a radius of 5.00 cm and a height of 10.0 inches if the density of copper

More information

5. The graph represents the net force acting on an object as a function of time. During which time interval is the velocity of the object constant?

5. The graph represents the net force acting on an object as a function of time. During which time interval is the velocity of the object constant? 1. A 0.50-kilogram cart is rolling at a speed of 0.40 meter per second. If the speed of the cart is doubled, the inertia of the cart is A) halved B) doubled C) quadrupled D) unchanged 2. A force of 25

More information

Chapter 5 Newton s Laws of Motion. Copyright 2010 Pearson Education, Inc.

Chapter 5 Newton s Laws of Motion. Copyright 2010 Pearson Education, Inc. Chapter 5 Newton s Laws of Motion Force and Mass Units of Chapter 5 Newton s First Law of Motion Newton s Second Law of Motion Newton s Third Law of Motion The Vector Nature of Forces: Forces in Two Dimensions

More information

Q2. A book whose mass is 2 kg rests on a table. Find the magnitude of the force exerted by the table on the book.

Q2. A book whose mass is 2 kg rests on a table. Find the magnitude of the force exerted by the table on the book. AP Physics 1- Dynamics Practice Problems FACT: Inertia is the tendency of an object to resist a change in state of motion. A change in state of motion means a change in an object s velocity, therefore

More information

Chapter 6. Applications of Newton s Laws

Chapter 6. Applications of Newton s Laws Chapter 6 Applications of Newton s Laws P. Lam 7_11_2018 Learning Goals for Chapter 5 Learn how to apply Newton s First Law & Second Law. Understand the cause of apparent weight and weightlessness Learn

More information

Newton s 3 Laws of Motion

Newton s 3 Laws of Motion Newton s 3 Laws of Motion 1. If F = 0 No change in motion 2. = ma Change in motion Fnet 3. F = F 1 on 2 2 on 1 Newton s First Law (Law of Inertia) An object will remain at rest or in a constant state of

More information

Chapter 5. The Laws of Motion

Chapter 5. The Laws of Motion Chapter 5 The Laws of Motion The Laws of Motion The description of an object in motion included its position, velocity, and acceleration. There was no consideration of what might influence that motion.

More information

HATZIC SECONDARY SCHOOL

HATZIC SECONDARY SCHOOL HATZIC SECONDARY SCHOOL PROVINCIAL EXAMINATION ASSIGNMENT VECTOR DYNAMICS MULTIPLE CHOICE / 45 OPEN ENDED / 75 TOTAL / 120 NAME: 1. Unless acted on by an external net force, an object will stay at rest

More information