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

Answer

See Diagram
1563506643

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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