Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Published by Pearson
ISBN 10: 0321740904
ISBN 13: 978-0-32174-090-8

Chapter 5 - Force and Motion - Conceptual Questions: 8

Answer

a) a = 8/2 m/s^2 a = 4 m/s^2 b) a = 8x2 = 16 m/s^2 c) a =8 m/s^2

Work Step by Step

a) We know that F = m x a. If m is constant, F is directly proportional to acceleration. So if force is halved acceleration becomes half. So a = 8/2 m/s^2 a = 4 m/s^2 b) We know that F = ma. If F is constant mass x acceleration will be constant. If mass is halved, keeping force constant, acceleration becomes double. So a = 8x2 = 16 m/s^2. c) We know that F = ma a = F/m. So if both F and m are doubled, the acceleration will be the same. a =8 m/s^2
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