College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 3 - Multiple-Choice Questions - Page 110: 9


The correct answer is: (b) 2400 m, north

Work Step by Step

The correct answer is: (b) 2400 m, north The area under the velocity versus time graph is the displacement. Each block in the graph is $1~m/s \times 120~s = 120~m$ During the entire 30.0 min, there are 26 blocks above the x-axis and 6 blocks below the x-axis. The blocks below the x-axis indicate a negative displacement. 26 blocks - 6 blocks = 20 blocks The displacement is $(20)(120~m) = 2400~m$ A positive displacement means that the jogger moves 2400 m to the north.
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