Conceptual Physics (12th Edition)

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

Chapter 4 - Think and Explain: 85

Answer

You state that the NET force is zero when the car is at rest. You explain to your friend that there may actually be multiple forces that are applied to the car, but they add to zero.
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