You drop a ball from a height of 2.5 m , and it bounces back to a height of 2.1

Question

You drop a ball from a height of 2.5m , and it bounces back to a height of 2.1m .

A. What fraction of its initial energy is lost during the bounce? 0.16

B. What is the ball's speed just before the bounce? 7.0 m/s

C. What is the ball's speed just after the bounce?

D. Where did the energy go?

The energy "lost" was changed primarily into thermal energy due to friction. The energy "lost" was changed primarily into chemical energy. The energy "lost" was changed primarily into heat energy. The energy "lost" was changed primarily into acoustic energy.

Explanation / Answer

The energy "lost" was changed primarily into heat energy.

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