Pre-Test 04b   1

Pre-Test 04b

1.     A body of mass 5.0 kg is suspended by a spring which stretches 10 cm when the mass is attached. It is then displaced downward an additional 5.0 cm and released. Its position as a function of time is approximately

2.     A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5.0 cos (pt). The magnitude of the acceleration (in m/s²) of the body at t = 1.0 s is approximately

3.     A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5 sin (pt + p/3). The phase (in rad) of the motion at t = 2 s is

4.     If y = 0.02 sin (30x - 400t) (SI units), the frequency of the wave is

5.     A mass m = 2.0 kg is attached to a spring having a force constant k = 290 N/m as in the figure. The mass is displaced from its equilibrium position and released. Its frequency of oscillation (in Hz) is approximately

6.     The oscillation of the 2.0-kg mass on a spring is described by

 where x is in centimeters and t is in seconds. What is the force constant of the spring?

a.	4.0 N/m
b.	0.80 N/m
c.	16 N/m
d.	32 N/m
e.	2.0  N/m

7.     The motion of a particle connected to a spring is described by x = 10 sin (pt). At what time (in s) is the potential energy equal to the kinetic energy?

8.     At sea level, at a latitude where

, a pendulum that takes 2.00 s for a complete swing back and forth has a length of 0.993 m. What is the value of g in m/s² at a location where the length of such a pendulum is 0.970 m?