Conceptual Physics (12th Edition)

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

Chapter 6 - Think and Explain: 79

Answer

By Newton’s third law, the car and truck exert equal and opposite forces on each other. These forces act for the same time interval, so they undergo equal and opposite impulses, and hence, equal and opposite changes in momentum. The magnitude of the Mini Cooper's deceleration is greater because of its smaller mass. By Newton's second law, a = F/m.
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