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in Physics by (57.1k points)
A ball is projected vertically down with an initial velocity from a height of `20 m` onto a horizontal floor. During the impact it loses `50%` of its energy and rebounds to the same height. The initial velocity of its projection is
A. `20ms^(-1)`
B. `15ms^(-1)`
C. `10ms^(-1)`
D. `5ms^(-1)`

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1 Answer

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by (41.2k points)
Correct Answer - A

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