Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Published by Pearson
ISBN 10: 0321740904
ISBN 13: 978-0-32174-090-8

Chapter 2 - Kinematics in One Dimension - Exercises and Problems - Page 65: 29

Answer

Velocity will be zero at $t=01,2,3,4 seconds$ Most positive at t=0.5 & 2.5 seconds Most negative at t = 1.5 &3.5 seconds

Work Step by Step

Velocity of block if given by the tangent of the y-t graph. Where the slope is zero , means velocity is zero. Where it is positive or negative means velocity is positive or negative respectively. Slope at $t=0, 1s,2s,3s,4 s$ is zero means velocity is zero at these points. Slope at $t =0.5s,2.5s$ is most positive means velocity at least points will be most positive. Slope at$t=1.5s,3.5s$ is most negative means velocity at these points is most negative. Graph between v and t is as
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