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 :

Question

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