College Physics (7th Edition)

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

Chapter 26 - Relativity - Learning Path Questions and Exercises - Multiple Choice Questions - Page 903: 2


(c) $150km/h$ westward

Work Step by Step

Car A is moving eastward with speed = $85km/h$ Car B is moving westward with speed = $65km/h$ The velocity of car B measured by driver in car A = $85+65=150km/h$ westward. For the driver in the car A he is at rest . Since both cars are moving in opposite directions, the speed of car B for him is the sum of speed of car A and car B moving westward. (c) 150 km/h westward is the answer.
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