Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 6 - Work and Energy - Questions: 18


If the ball were not pushed, it would return almost to its initial position (it might be a little lower due to frictional losses) and come to rest.

Work Step by Step

If the ball were pushed, it would have an initial kinetic energy. When it returned to its initial position, it would still have some kinetic energy, and continue to swing upward (converting the KE to gravitational PE), striking the instructor.
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