Conceptual Physics (12th Edition)

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

Chapter 3 - Think and Explain: 54

Answer

The car is approaching you at twice the specified speed limit.

Work Step by Step

The other car's velocity relative to the you equals the vector sum of its velocity relative to the ground, and the Earth's velocity relative to you. Those vectors point in the same direction.
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