The displacement d (in meters) of an object at time t (in seconds) is given. Describe the motion of the object. What is the maximum displacement from its resting position, the time required for one oscillation, and the frequency?d = -2 cos 
A. simple harmonic; 2 m; 
sec; 4 oscillations/sec
B. simple harmonic; -2 m; 4 sec; 
oscillation/sec
C. simple harmonic; 2 m; 4 sec; 
oscillation/sec
D. simple harmonic; 2 m; 2 sec; 
oscillation/sec
Answer: C
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