Answer
a) 21.17 m/s
b) 2 m/s
Work Step by Step
a) $v_{average}$ = $\frac{385m-25m}{20s-3s}=21.17 m/s$
b) $a_{average}$ = $\frac{45m/s-11m/s}{20s-3s}=2m/s$
Physics: Principles with Applications (7th Edition)
by Giancoli, Douglas C.
Published by
Pearson
ISBN 10:
0-32162-592-7
ISBN 13:
978-0-32162-592-2
Chapter 2 - Describing Motion: Kinematics in One Dimension - Problems - Page 44: 21
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