Conceptual Physics (12th Edition)

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

Chapter 5 - Think and Explain: 67

Answer

a. Shown in diagram. There are two normal forces, and gravity. b. Shown in diagram. The resultant of the two normal forces is equal and opposite to the stone’s weight, so the resultant of all three forces is zero.
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