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A ball is thrown vertically downwards fr...

A ball is thrown vertically downwards from a height of 20m with an intial velocity `v_(0)`. It collides with the ground, loses 50% of its energy in collision and rebounds to the same height. The intial velocity `v_(0)` is (Take, g =10 `ms^(-2)`)

A

`10" ms"^(-1)`

B

`14" ms"^(-1)`

C

`20" ms"^(-1)`

D

`28" ms"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
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TARGET PUBLICATION-FORCE -Competitive Theinking (4.4 Elastic and inelastic collision)
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