Reading:

Cutnell and Johnson, Chapters 10 and 11.

Problems for Review:

Reviewing these problems gives you good exposure to this week's main topics, in practice. All solutions are posted on our website |http://www.cc.emory.edu/PHYSICS/Faculty/Benson/141/review.html|. Quantitative solutions are also in the Student Study Guide.

Conceptual:

MCAT review problems 12, 13, 14 (on website).

Quantitative:

Chapter 10, problems 5, 15, 19, 25, 29, 33, 41.
Chapter 11, problems 19, 31, 43, 55, 57, 59, 89, 91

Problems to Hand In:

Conceptual:

Use the following to answer questions 1 -- 10:

A 2 kg massive block attached to an ideal spring is constrained to oscillate in one dimension on a horizontal frictionless surface. A mark has been placed at an arbitrary location on the table to designate the x=0 position for this motion. As the mass oscillates without loss of energy it traces the path shown on the graph below.

1. What is the amplitude of the motion for this oscillator?
   1. 6 m
   2. - 4 m
   3. 5 m
   4. 2 m
2. What is the period of the oscillator?
   1. 2 s
   2. 4 s
   3. 6 s
   4. 8 s
3. What is the angular frequency of the oscillator?
   1. rad/ s
   2. rad/ s
   3. rad/ s
   4. rad/ s
4. When is the mass moving the slowest?
   1. 1 s
   2. 2.5 s
   3. 5 s
   4. 6 s
5. When does the mass have its greatest acceleration (greatest magnitude)?
   1. 1 s
   2. 2.5 s
   3. 5 s
   4. 6 s
6. What is the spring constant of the spring?
   1. 4.93 N/m
   2. 0.5 N/m
   3. 25 N/m
   4. 17.1 N/m
7. What is the energy of the spring-mass system?
   1. 37.5 J
   2. 62.5 J
   3. 100 J
   4. 125 J
8. If the same mass were suspended vertically from the spring, by how much would the spring stretch?
   1. 1.3 m
   2. 2.7 m
   3. 4 m
   4. 4.8 m

   
   For questions 9 and 10, consider suspending the mass vertically from the spring, while submersed in a vat of viscous fluid, with density equal to 1/3 the density of the massive block.
   

9. How much does the spring stretch from its free, unstrained equilibrium position, when the mass is suspended in fluid rather than air?
   1. 1.3 m
   2. 2.7 m
   3. 4 m
   4. 4.8 m
10. The block, hanging in equilibrium in the fluid at height , is pulled downward then released at t=0. Which of the following could describe the block's subsequent motion? (Note that the viscous fluid exerts a frictional force on the block, draining its energy).

    

Quantitative I:

Complete these end-of-chapter problems (not questions!) from your textbook, submitting only your final circled choice for an answer.

Chapter 10.

28.

40.

42.

Chapter 11.

14.

22.

36.

40.

44.

56.

Quantitative II:

Chapter 10, problem 68.
Chapter 11, problems 53, 61.

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