A ball of mass \( m \) fall vertically to the ground from a height \( h_{1} \) and rebound to a ....

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A ball of mass \( m \) fall vertically to the ground from a height \( h_{1} \) and rebound to a height \( h_{2} \). The change in
P
momentum of the ball on striking the ground is
(1) \( m g\left(h_{1}-h_{2}\right) \)
(2) \( m\left(\sqrt{2 g h_{1}}+\sqrt{2 g h_{2}}\right) \)
(3) \( m \sqrt{2 g\left(h_{1}+h_{2}\right)} \)
(4) \( m \sqrt{2 g}\left(h_{1}+h_{2}\right) \)


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