Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 10 - Section 10.5 - Rolling Motion - Got It?: 10.7

Answer

c)

Work Step by Step

It is certainly not at rest, for if the wheels did not move, the train would just skid, so we can eliminate b) right off the bat. Now, we have to determine which direction the wheel is going. In order to move the train forward, the wheel must go in the clockwise direction. Thus, we see that the bottom of the wheel must go opposite the train's motion.
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