Physics (10th Edition)

Published by Wiley
ISBN 10: 1118486897
ISBN 13: 978-1-11848-689-4

Chapter 2 - Kinematics in One Dimension - Problems - Page 48: 19

Answer

a) 18 m/s b) 6.0 m/s c) 6.0 m/s d) 18 m/s

Work Step by Step

v = u + at To find the final speed, take the magnitude of the final velocity a) v = (12) + (3.0)(2.0) = 18 Final speed is 18 m/s b) v = (12) + (-3.0)(2.0) = 6.0 Final speed is 6.0 m/s c) v = (-12) + (3.0)(2.0) = -6.0 Final speed is 6.0 m/s d) v = (-12) + (-3.0)(2.0) = -18 Final speed is 18 m/s
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