University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 2 - Motion Along a Straight Line - Problems - Exercises - Page 60: 2.30

Answer

a) at t=4s, v=2.67cm/s at t=7s, v=-1.33cm/s b)a=-1.33cm/s^{2} for t=3,6,7s

Work Step by Step

At t=0s, v=8 t=6s, v=0 Gradient (m) = \frac{-8}{6} at t=4, v=8-5.333=2.67cm/s at t=7, v=-1.33cm/s b) gradient of v-t graph = acceleration = -1.33cm/s^{2}
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