Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 7 - Think and Explain: 79

Answer

When a real Superball hits a rigid floor, some of its KE is transformed to thermal energy and sound. It also encounters air resistance on the way down and up, transforming KE to heat. It will not reach its original level and attain its original PE because some of the original potential energy was converted into other forms.
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