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: 9

Answer

The answer is below.

Work Step by Step

While energy is always conserved, it is not always conserved in a useful form. For instance, when a car is driving, energy is lost to heat and sound. Thus, the energy still exists, but it no longer is in a form that can do something useful like drive a car.
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