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.

The two thigh bones (femurs) each of cross - sectional area 10cm^(2) s

1.	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.
Answer» Solution :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`