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: 3

Answer

According to physics, no work is done on the wall (the displacement is zero). However, physiologically, your arm and leg muscles still twitch and burn chemical energy, converting it to other forms of energy (e.g., heat). This makes you feel tired, and you need to replenish your energy with some food.

Work Step by Step

You and your muscles are still doing work even though no work is technically being done to the wall.
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