Chapter 10:Review Questions

10.1 Simple Harmonic Motion

1. Why is the force exerted by a spring called a restoring force?

2. What does it mean to say the restoring force of a spring is proportional to how far the spring has been stretched from equilibrium?

3. What is meant by the "amplitude" of an oscillation?

4. What is meant by the period or the frequency of an oscillation?

5. How are period and frequency related?

6. How can a simple harmonic oscillator be used in keeping time?

10.2 Energy Considerations

7. How can energy be conserved if it is constantly changing from potential to kinetic?

8. Why is the speed greatest as a simple harmonic oscillator moves through its equilibrium position?

9. Why does a simple harmonic oscillator stop when its displacement equals its amplitude.

10.3 Spring and Hanging Mass

10. Explain what is meant by saying the restoring force exerted by a spring is proportional to how far it has been stretched from equilibrium.

11. Explain why increasing the mass of a mass-and-spring oscillator will cause its period to increase.

12. Explain why a stronger spring, with larger value of spring constant k, in a mass-and-spring oscillator will cause its period to decrease.

10.4 Simple Pendulum

13. As a pendulum's length is increased, what happens to its period?

14. If the acceleration due to gravity were increased, how would that affect the period of a simple pendulum?

15. If the mass at the end of a simple pendulum is increased, what happens to the period of the pendulum?

10.5 Physical Pendulum

16. As you swing on a playground swing, what will happen to your period if you move from a sitting position to a standing position?

10.6 Torsional Oscillations

17. When a torsional pendulum is rotated from equilibrium, the restoring torque twists it back toward equilibrium. Why does it overshoot its equilibrium position?

10.7 Damped and Driven Oscillations

18. If the water in the damped oscillator of Figure 10.12 is replaced with warm syrup, what will happen to the motion of the oscillator? How will the motion be affected?

19. If shock absorbers are replaced by ones that are too strong or too heavy, how will this affect the ride of your car?

20. How will the ride of your car be affected as your shock absorbers wear out?

21. How can striking one of the chimes in Figure 10.13 cause the other chime to ring?

22. What is meant by the "natural frequency" of an oscillator?