(a) A ball is thrown vertically down towards the ground and rebounds as illustrated in
Fig. 10.
Fig. 10
As the ball passes A, it has a speed of 8.4 m s–1. The height of A is 5.0 m above the
ground. The ball hits the ground and rebounds to B. Assume that air resistance is
negligible.
(i) Calculate the speed of the ball as it hits the ground.
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Answer:
the speed of the ball as it hits the ground is 8.4 ms^-1
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