You are here


The femur bone in the human leg has a minimum effective cross section of about $3.0 \textrm{ cm}^2 \; (= 3.0 \times 10^{-4} \textrm{ m}^2)$. How much compressive force can it withstand before breaking?

Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014. Reprinted by permission of Pearson Education Inc., New York.
The question will be visible after logging in, as required by Pearson Education Inc.

Quick Answer: 

$5.1 \times 10^4 \textrm{ N}$

Giancoli 7th Edition, Chapter 9, Problem 50


Chapter 9, Problem 50 is solved.

View sample solution

Transcript for this Giancoli solution

This is Giancoli Answers with Mr. Dychko. The maximum compressive stress that bone can withstand is 170 times 10 to the 6 newtons per square meter which we get from table [9-2] on page 245 and that equals force over area because stress is force divided by cross-sectional area. So we multiply both sides by A and then we get F is A times that compressive strength. And so area is 3.0 times 10 to the minus 4 square meters times 170 times 10 to the 6 newtons per square meter and you get 5.1 times 10 to the 4 newtons.