An object of mass m (in grams) attached to a coiled spring with damping factor b (in grams per second) is pulled down a distance a (in centimeters) from its rest position and then released. Assume that the positive direction of the motion is up and the period is T (in seconds) under simple harmonic motion. Develop a model that relates the distance d of the object from its rest position after t seconds.m = 30, a = 7, b = 0.6, T = 3
A. d = -7e-0.6t/60 cos 
B. d = 7e-0.6t/60 cos 
C. d = 7e0.6t/60 cos 
D. d = -7e-0.6t/60 cos 
Answer: A
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, 1)
A. 
B. 
C. 
D. 
Solve the equation.
= 5
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