Physics: Principles with Applications (7th Edition)

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

Chapter 7 - Linear Momentum - Problems: 2

Answer

-5.8 m/s.

Work Step by Step

Use equation 7–2 applied to a single force, and re-arrange it to solve for the change in velocity. $$\Delta v = \frac{F \Delta t}{m}$$ Assume the skier moves to the right, then the friction force is directed to the left, and the velocity will decrease. $$\Delta v = \frac{(-25 N) (15 s)}{65 kg} = -5.8 m/s$$
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