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A ball is falling from a height . When it reaches 10 m height from the 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 :

\[\begin {array} {1 1} (1)\;7 \;m/s & \quad (2)\;10\;m/s \\ (3)\;14 \;m/s & \quad (4)\;16 \;m/s \end {array}\]

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(3) 14 m/s
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