A ball is dropped from a height of 10 meters onto a hard surface so that the collision at the surface may be assumed elastic. Under such conditions the motion of the ball is
(A) simple harmonic with a period of about 1.4 s
(B) simple harmonic with a period of about 2.8 s
(C) simple harmonic with an amplitude of 5 m
(D) periodic with a period of about 2.8 s but not simple harmonic
(E) motion with constant momentum
The Attempt at a Solution
I would assume that since its an elastic collision, that it would engage in simple harmonic motion, but the answer is D so evidently that is not the case. Anyone care to explain?