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: 2.21

Answer

(a) $a = 675 ~m/s^2$ (b) $t = 66.7~ms$

Work Step by Step

(a) $a = \frac{v^2-v_0^2}{2x} = \frac{(45.0 ~m/s)^2 - 0}{(2)(1.50 ~m)} = 675 ~m/s^2$ (b) $t = \frac{v-v_0}{a} = \frac{45.0~m/s}{675~m/s^2}$ $t = 0.0667~s = 66.7 ~ms$
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