Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 7 - Newton's Third Law - Conceptual Questions: 13

Answer

The force of the string on block B is smaller than the force of the hand on A.

Work Step by Step

Consider the free-body diagram for block A. The force from the hand $F$ and the tension $T$ are the two horizontal forces acting on block A. Since block A accelerates in the direction of the hand's force $F$, then $F$ must be greater in magnitude then $T.$ Note that $T$ is the force of the string on block B. Therefore, the force of the string on block B is smaller than the force of the hand on A.
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