A rubber ball is dropped from a distance of 140 m above
A rubber ball is dropped from a distance of 1.40 m above ground and bounces to 60% of its original height. If the average force exerted on the ball is ten times its weight, how long is the ball in contact with the ground?
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a rubber ball is dropped from a distance of 140 m above ground and bounces to 60 of its original height if the average
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