Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 2 - Describing Motion: Kinematics in One Dimension - Problems: 8

Answer

a. 5.3 m/s. b. 1.8 m/s.

Work Step by Step

a. The definition of average speed is the total distance over the time. The distance traveled is 38 m + 0.5(38 m) = 57 m. $$\frac{57 m}{9.0 s + 1.8 s} = 5.3 m/s$$ b. The displacement is 19 m. $$\frac{19 m}{9.0 s + 1.8 s} = 1.8 m/s$$
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