Conceptual Physics (12th Edition)

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

Chapter 8 - Think and Discuss: 112

Answer

See diagram. Call the bricks A, B, and C starting from the bottom. Brick C's CG is marked with an "x". It must be supported by brick B beneath it. The CG of the system of bricks B and C is midway between their CGs, and marked with a small circle. This is 1/4 of a brick length away from the right-hand end of brick B. This CG must be supported by brick A beneath it. With three bricks, the maximum overhang is achieved when the top brick extends 3/4 of a brick beyond the end of the bottom brick.
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