College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 2 - Problems: 33

Answer

The upward force of the water acting on the mattress is 806 N

Work Step by Step

We can think of the man and the mattress as a single system. Since the system is in equilibrium, the magnitude of the upward force $F_w$ of the water acting on the mattress is equal to the weight of the system: $F_w = 806~N$ The upward force of the water acting on the mattress is 806 N.
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