University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 4 - Newton's Laws of Motion - Problems - Discussion Questions - Page 123: Q4.17

Answer

The big rock has more inertia.

Work Step by Step

Mass is a measure of inertia. Your foot must exert more force on the bigger rock to get it moving, and in turn, the bigger rock exerts a larger force on your foot. Yes, it will hurt more to kick the larger rock.
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