Conceptual Physics (12th Edition)

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

Chapter 7 - Think and Discuss - Page 130-131: 108

Answer

The force that the rock exerts on the ground depends on the distance over which the force is applied. If the rock suddenly stops, the force is greater than if it gradually comes to rest. Without a stopping distance or time, the force can't be calculated.
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