A ball of mass 1 kg is dropped from a height of
7 m and rebounds to a height of 4.5 m. Calculate:
(a) its kinetic energy before the impact and
[Ans. 70 ]
(b) its initial rebound velocity and kinetic energy
[Ans. 11.8 ms and 45 J1
(c) the loss of kinetic energy. [Ans. 15 m
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hello mate I don't know
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