Conceptual Physics (12th Edition)

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

Chapter 5 - Think and Explain - Page 87-89: 41

Answer

When the ball hits the floor, exerting a downward force on it, the floor exerts an equal force upward on the ball. The force exerted by the floor on the ball changes its velocity and causes it to bounce.
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