Conceptual Physics (12th Edition)

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

Chapter 2 - Think and Rank: 34

Answer

A=B=C (no force) C, B, A

Work Step by Step

The normal force from the ice cancels each weight, so the net force is zero. In that case, each mass continues to move at the same speed in a straight line, and no outside force is required Since all the forces have the same time to act, a faster-moving object requires a larger force to reduce its speed all the way to zero.
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