Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 2 - Kinematics in One Dimension - Exercises and Problems - Page 59: 5


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Work Step by Step

The velocity of any particular part of the graph can be found by finding the slope of the graph by finding the rise-over-run. for the first second, the graph increases by 10m in 1 second, resulting in $10m/s$ velocity. The graph is flat for the seconds and third seconds, so the velocity is $0$ for this time period. For the 4th second, the graph has the same slope and velocity as the first second. $20m-10m= 10m$ and $4s-3s=1s$ which is used to find $10m/s$.
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