Conceptual Physics (12th Edition)

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

Chapter 3 - Think and Explain: 56

Answer

Emily is closer to being correct. Jacob is thinking about speed, "how fast you go."

Work Step by Step

They both need to remember that you can accelerate even if you're not getting any faster or slower, for example, if you go around a curve at constant speed.
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