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: 16

Answer

The drawing shows the water at the bottom of the waterfall (with lower potential energy) flowing on its own back to the top. However, water won’t run uphill on its own; some energy must be input (for example, by a pump).

Work Step by Step

Water cannot raise its own PE without doing any work to achieve this.
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