A ball of mass m falls vertically to the ground from a height$ h_1$ and rebound to a height ${h_2}$. The change in momentum of the ball on striking the ground is
A ball of mass m falls vertically to the ground from a height$ h_1$ and rebound to a height ${h_2}$. The change in momentum of the ball on striking the ground is
- A
$mg({h_1} - {h_2})$
- B
$m(\sqrt {2g{h_1}} + \sqrt {2g{h_2}} )$
- C
$m\sqrt {2g({h_1} + {h_2})} $
- D
$m\sqrt {2g} ({h_1} + {h_2})$
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