Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 9 - Static Equilibrium; Elasticity and Fracture - Misconceptual Questions: 9


Choice D.

Work Step by Step

Doubling the size in each of 3 directions increases the weight of the garage by a factor of eight. This is the force that compresses each column. The owner wants to keep the stress on each column the same. The cross-sectional area of each column must increase by the same factor of eight.
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