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maxd23
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Homework Statement
While unrealistic, we will examine the forces on a leg when one falls from a height by approximating the leg as a uniform cylinder of bone with a diameter of 2.3 cm and ignoring any shear forces. Human bone can be compressed with approximately 1.7 × 10^8 N/m2 before breaking. A man with a mass of 80 kg falls from a height of 5 m. Assume his acceleration once he hits the ground is constant. For these calculations, g = 10 m/s2.
With how much force can the "leg" be compressed before breaking?
Homework Equations
The Attempt at a Solution
The correct answer:
I’m confused about how the answer is 7.1E4 N , can you explain how to get this answer from the data given?
wouldn’t it be F = (1.7 × 10^8 N/m2)*(2.3cm(1m/100cm)^2 = 3.9E4 N ?