College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 3 - Motion in Two Dimensions - Learning Path Questions and Exercises - Exercises - Page 101: 72

Answer

a). $85km/hr$ b). $-5km/hr$

Work Step by Step

a). Velocity of the ball relative to the ground = $15+70=85km/hr$ b). Velocity of the ball relative to the car =$85=90=-5km/hr$
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