Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 3 - Think and Discuss: 89

Answer

The ball on the middle hill.

Work Step by Step

The ball speeds up very quickly at the beginning because the hill is very steep, and so it spends most of the time moving rapidly. This is more than enough to compensate for the fact that its path is longer than in the first hill.
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