Physics (10th Edition)

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

Chapter 7 - Impulse and Momentum - Focus On Concepts - Page 190: 7


b) is correct.

Work Step by Step

We have $$\overline F=\frac{J}{\Delta t}=\frac{|p_f-p_0|}{\Delta t}$$ Region A: $\overline F_A=\frac{|8-4|}{4}=1N$ Region B: $\overline F_B=\frac{|8-8|}{1}=0$ Region C: $\overline F_C=\frac{|0-8|}{2}=4N$ Region D: $\overline F_D=\frac{|0-0|}{2}=0$ So, we find that the magnitude of the force in region C is the largest, and in region B and D it is the smallest. b) is correct.
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