The femur bone in a human leg has a minimum effective cross section of 3.15cm^2. How much compressive force can it withstand before breaking? Assume the ultimate strength of the bone to be 1.70*10^8 N/m^2. Answer in N.

Question

The femur bone in a human leg has a minimum effective cross section of 3.15cm^2. How much compressive force can it withstand before breaking? Assume the ultimate strength of the bone to be 1.70*10^8 N/m^2.  Answer in N.

anonymous · Answer

Same as before, you are just given new information.

Notice the units of the cross-section. This is an area A.
Notice the units of the strength. This is a stress strength S.
You are looking for force.

S = F / A

so: F = S * A