Question: A 0.20-kg rubber ball is dropped from a height of 1.0 m above the floor and it bounces back to a height of 0.70 m.

A 0.20-kg rubber ball is dropped from a height of 1.0 m above the floor and it bounces back to a height of 0.70 m.
(a) What is the ball’s speed just before hitting the floor?
(b) What is the speed of the ball just as it leaves the ground?
(c) How much energy was lost and where did it go?

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a Energy conservation gives mgh 1 mv 1 2 Solving for v 1 gives v 1 2 gh 1 12 2980 m... View full answer

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