Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Published by Pearson
ISBN 10: 0321740904
ISBN 13: 978-0-32174-090-8

Chapter 11 - Work - Exercises and Problems - Page 304: 25

Answer

See the figure below.

Work Step by Step

The system loses 400 J of its potential energy due to doing 400 J of work on the environment. Now we know where the potential energy goes but what about the increase of the thermal energy where did it come from? It must come from the initial kinetic energy. So, the process is as seen below.
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