Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 7 - For Thought and Discussion - Page 125: 8


The answer is below.

Work Step by Step

The tightrope walker stayed at a constant height, so gravity did not do work on him. With the walker, however, gravity did positive work on the way down and negative work on the way up, and these two works cancel to 0. Thus, the work done on both hikers is 0.
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