How long was the ball in contact with the sidewalk

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A 0.5-kg rubber ball is dropped from rest a height H = 19.6 m above the surface of the Earth. It strikes the sidewalk below and rebounds up to a maximum height of 4.9 m. If the magnitude of the average force the sidewalk exerts on the ball during the collision is 73.5 N, how long (in s) was the ball in contact with the sidewalk?

Reference no: EM13973585

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