Q .     A ball is falling freely from a height. When it reaches `10 m` height from ground its velocity is `V_0`. It collides with the ground and loses `50%` of its energy and rises back to height of `10 m`. Then the velocity `V_0` is :

EAMCET 2010
A

`7m/s`

B

`10m/s`

C

`14m/s`

D

`16m/s`

HINT

User the concept of conservation of energy
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