Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 8 - Think and Do: 32

Answer

The cups roll off the tracks.

Work Step by Step

The principles are discussed on page 135. Try it and see. If the cups deviate to, say, the right, the new smaller effective diameter of the wheel on the right will result in a smaller tangential speed on that side, throwing the cups even more off-center.
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