a rubber ball of mass 50g falls from a height of 10 cm and rebounds to a height of 50 cm .determine the change in the linear momentum and average force between the ball and the ground taking time of contact as 0.1 sec

Answer 1

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Unless thrown downward at a high velocity, the ball cannot rebound to a higher height than it started from.

Answer 2

Sure, the problem is correct.
The answer is 0.225 kg m/sec