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: Q4.19

Answer

The person who dives into water is stopped over a longer distance and time period.

Work Step by Step

When a person jumps from a height of 10m into water, she is brought to rest over a distance of several meters, with a relatively small acceleration and a relatively small upward force from the water. On the other hand, when a person jumps from a height of 10m onto concrete, though she lands at the same speed as before, she is brought to rest over a distance of millimeters, with a huge acceleration and an extremely large upward force from the ground.
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