1. Select the correct answer. The potential energy for a mass on a spring is proportional to the square of which of these quantities? A. mass B. frequency C. period D. displacement E. velocity

2. Select the correct answer. What are the units for the spring constant, k? A. newton meters B. newton seconds C. newtons/meter D. newtons/second E. newtons/seconds^2

3. Select the correct answer. Which term describes the time it takes for an object to complete one full cycle of motion on a spring? A. period B. frequency C. amplitude D. time E. force

4. Select the correct answer. A mass is stretched 4 centimeters from the equilibrium position of a spring. If the displacement is doubled, what can be concluded about the restoring force? A. It is halved. B. It is doubled. C. It stays the same. D. It is increased by 4. E. It is decreased by 1/4

5. Select the correct answer. Which statement describes the velocity of a mass oscillating on a spring? A. The velocity is constant throughout the motion. B. The velocity remains the same throughout the motion. C. The velocity is zero at the maximum displacement. D. The velocity is greatest at the maximum position. E. The velocity is least at the equilibrium position.

6. Select the correct answer. When are the displacement and acceleration equal to zero for the motion of a mass on a spring? A. at maximum displacement B. at minimum displacement C. at the equilibrium position D. at a displacement of 2x E. at a displacement of 1/3 x

7. Select the correct answer. What is the force applied by a spring as it stretches upward 0.25 meters and has a k value of 25 newtons per meter? A. 1 newton B. 5.5 newtons C. 6.3 newtons D. 10 newtons E. 50 newtons

8. Select the correct answer. In Hooke's law, what does the x represent? A. the thickness of the spring B. the length of the spring C. the displacement of the spring D. the distance from stretched to compressed E. the equilibrium distance

9. Select the correct answer. In addition to gravity, what is the other predominant force that affects the motion of a pendulum? A. the force of friction B. the force of tension C. the force of air resistance D. the restoring force E. the normal force

10. Select the correct answer. If you know that the period of a pendulum is 1.87 seconds, what is the length of that pendulum? (Assume that we are on Earth and that gravity is 9.81 meters/second. ) A. 0.87 centimeters B. 2.1 meters C. 1.6 meters D. 0.87 meters E. 8.3 meters

11. Select the correct answer. Besides the force due to gravity or g, what else determines the period of a pendulum? A. tension of the cord B. mass of the pendulum bob C. length of the cord D. amplitude of the swing E. Only gravity is important when calculating the period of a pendulum.

12. Select the correct answer. When a pendulum is at the position all the way to the left when it is swinging (at the top of the arc), what is true of the kinetic and potential energy? A. The potential energy is zero, and the kinetic energy is maximized. B. The kinetic energy is zero, and the potential energy is maximized. C. Both the kinetic and potential energy are zero. D. Both the kinetic and potential energy are at their maximum. E. There is no energy at this position.

13. Select the correct answer. What is the centripetal acceleration of a small laboratory centrifuge in which the tip of the test tube is moving at 19.0 meters/second in a circle with a radius of 10.0 centimeters? A. 1.82 102 meters/second^2 B. 3.61 103 meters/second^2 C. 5.64 103 meters/second^2 D. 2.49 103 meters/second^2 E. 1.18 103 meters/second^2

14. Select the correct answer. What is the centripetal force that would be required to keep a 4.0 kg mass moving in a horizontal circle with a radius of 0.80 meters at a speed of 6.0 meters/second? A. 3.9 101 newtons tangent to the circle B. -3.0 101 newtons tangent to the circle C. 1.4 102 newtons radially outward D. 1.8 102 newtons radially inward E. 1.8 102 newtons radially outward

15. Select the correct answer. What is the centripetal acceleration of a ball on a string that is whirled horizontally over a boy's head? The radius of the circle is 1.8 meters, and the ball is traveling at 9.2 meters/second. A. 19 meters/second^2 B. 84 meters/second^2 C. 110 meters/second^2 D. 31 meters/second^2 E. 47 meters/second^2

16. Select the correct answer. Which statement is true about an object that is moving in a circular motion due to centripetal force, F, when the radius of its circular motion is doubled? A. The new force then becomes equal to 2F B. The new force then becomes equal to F C. The new force then becomes equal to F/2 D. The new force then becomes equal to F^2 E. The new force then becomes equal to 1/F

17. Select the correct answer. The planet Jupiter revolves around the Sun in a period of about 12 years (3.79 108 seconds). What is its mean distance from the center of the Sun? The mass of the Sun is 1.99 1030 kilograms. A.