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 - Exercises and Problems: 22

Answer

The tension at the midpoint of the rope is 9.8 N

Work Step by Step

Let $T$ be the tension at the midpoint of the rope. Note that this tension holds up the bottom half of the rope. Therefore, this tension is equal in magnitude to the weight of the bottom half of the rope. $T = \frac{mg}{2}$ $T = \frac{(2.0~kg)(9.80~m/s^2)}{2}$ $T = 9.8~N$ The tension at the midpoint of the rope is 9.8 N
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