Hard

Question

Consider a rubber ball freely falling from a height h = 4.9 m onto a horizontal elastic plate. Assume that the duration of collision is negligible and the collision with the plate is totally elastic. Then the velocity as a function of time the height as function of time will be

Options

A.
B.
C.
D.

Solution

       
h = gt2,       v = - gt and after the collision, v = gt.
(parabolic)       (straight line)
Collision is perfectly elastic then ball reaches to same height again and again with same velocity.

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