1.

Gina's favorite exercise equipment at the gym consists of various springs. In one exercise, she pulls a handle grip attached to the free end of a spring to 0.80 m from its unstrained position. The other end of the spring (spring constant = 53 N/m) is held in place by the equipment frame. What is the magnitude of the force that Gina is applying to the handle grip? A. 31 N B. 36 N C. 42 N D. 54 N E. 66 N

2.

Which one of the following statements is true concerning an object executing simple harmonic motion? A. Its velocity is never zero. B. Its acceleration is never zero. C. Its velocity and acceleration are simultaneously zero. D. Its velocity is zero when its acceleration is a maximum. E. Its maximum acceleration is equal to its maximum velocity.

3.	When a force of 20.0 N is applied to a spring, it elongates 0.20 m. Determine the period of oscillation of a 4.0-kg object suspended from this spring. A. 0.6 s B. 1.3 s C. 3.1 s D. 4.1 s E. 6.3 s

4.	A ball hung from a vertical spring oscillates in simple harmonic motion with an angular frequency of 2.6 rad/s and an amplitude of 0.075 m. What is the maximum acceleration of the ball? A. 0.13 m/s2 B. 0.20 m/s2 C. 0.51 m/s2 D. 2.6 m/s2 E. 35 m/s2

5.	A 1.0-kg object is suspended from a spring with k = 16 N/m. The mass is pulled 0.25 m downward from its equilibrium position and allowed to oscillate. What is the maximum kinetic energy of the object? A. 0.25 J B. 0.50 J C. 1.0 J D. 2.0 J E. 4.0 J

6.	A spring required a force of 1.0 N to compress it 0.1 m. How much work is required to stretch the spring 0.4 m? A. 0.4 J B. 0.6 J C. 0.8 J D. 2 J E. 4 J

7.

A 10-kg box is at rest at the end of an unstretched spring with constant k = 4000 N/m. The mass is struck with a hammer giving it a velocity of 6.0 m/s to the right across a frictionless surface. What is the amplitude of the resulting oscillations of this system? A. 0.3 m B. 0.4 m C. 0.5 m D. 0.6 m E. 2 m

8.

A spring with constant k = 40.0 N/m is at the base of a frictionless, 30.0°-inclined plane. A 0.50-kg block is pressed against the spring, compressing it 0.20 m from its equilibrium position. The block is then released. If the block is not attached to the spring, how far along the incline will it travel before it stops? A. 0.080 m B. 0.16 m C. 0.32 m D. 1.6 m E. 3.2 m

9.	In a certain clock, a pendulum of length L1 has a period T1 = 0.95 s. The length of the pendulum is adjusted to a new value L2 such that T2 = 1.0 s. What is the ratio L2/L1? A. 0.90 B. 0.95 C. 1.0 D. 1.1 E. 1.3

10.	A 0.750-kg object hanging from a vertical spring is observed to oscillate with a period of 2.00 s. When the 0.750-kg object is removed and replaced by a 1.25-kg object, what will be the period of oscillation? A. 1.55 s B. 2.58 s C. 3.32 s D. 4.38 s E. 7.45 s

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