There was also this bit of information in the problem that I assumed wasn't important:
"The normal force of the ground on the foot can reach three times a runner's body weight when the foot strikes the pavement."
Homework Statement
By what amount does the 52-cm-long femur of an 73 kg runner compress at this moment? The cross-section area of the bone of the femur can be taken as 5.2×10-4 m2 and its Young's modulus is 1.6×1010 N/m2.
Express your answer to two significant figures and include the...