A ball of mass 3kg drops from rest to the ground from a height of 5m. After the impact it rebounds to the same height. Assume that the time of impact between the ball and the ground is 0.2s. What is the rorce of impact acting on the ground surface by the ball?
The answer is 330N, not 300N. 300 is the net force acting on the ball during impact. Talking about impact force acting on the ground surface by the ball, it is action force acting on the ground by the ball in other words, so we have to include weight in the calculation.
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