Conceptual Physics (12th Edition)

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

Chapter 7 - Think and Explain - Page 129-130: 82


The second classmate is correct. A low summit can be followed by a higher one.

Work Step by Step

The car will be moving quickly at the top of the low summit, possessing both KE and PE. After that, it can still make it to the top of a higher summit (where it will have more PE and less KE), as long as friction hasn't transformed too much KE and PE to thermal energy.
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