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A ball is projected vertically down with...

A ball is projected vertically down with an initial velocity from a height of 20 m on to a horizontal floor. During the impact it loses 50% of the energy and rebounds to the same height, the initial velocity of its projection is

A

`20ms^(-1)`

B

`15ms^(-1)`

C

`10ms^(-1)`

D

5` ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
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