Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 15 - Oscillations - Questions - Page 435: 3b



Work Step by Step

At point 4 on the graph, we see that the acceleration is 0. We know that the integral of the acceleration will give us velocity. If we look between $t=0$ and $t=4$, we see that we have only positive area (area above the x-axis) and therefore the velocity will be positive as well.
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