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The two thigh bones (femurs) each of cro...

The two thigh bones (femurs) each of cross - sectional area `10cm^(2)` support the upper part of a human body of mass 40 kg . Estimate the average pressure sustained by the femurs.

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Total cross sectional are of the femurs is `A=2 times 10^-4 m^2`. The force acting on them is F=40 kg wt =400n . This force is acting vertically down, and hence, normally on the femurs. That the average pressure is
`P_(av)=F/A=2 times 10^ N m^-2`
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