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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2015
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Q)

A ball is thrown vertically downwards from a height of $20 m$ with an initial velocity $v_0$. It collides with the ground, loses 50 percent of its energy in collision and rebounds to the same height. The initial velocity $v_0$ is : (Take g = $10 ms^{–2}$)


( A ) $14 \; ms^{-1}$
( B ) $10 \; ms^{-1}$
( C ) $20 \; ms^{-1}$
( D ) $28\; ms^{-1}$

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