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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 and the height as function of time will be

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answer is C.

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Detailed Solution

$h = \frac{1}{2} {gt}^{2};$ i.e, path : parabolic

$v = - gt, and after the collision, v = gt$ i.e, path: straight line

Collision is perfectly elastic then ball reaches to same height again and again with same velocity.

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