1. The problem statement, all variables and given/known data 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 appropriate units. 2. Relevant equations Stress on femur = F/A Strain = delta L/L = (1/Y)(F/A) 3. The attempt at a solution F/A = (73 kg * 9.8 m/ss)/(5.2 * 10-4 m2) = 1375769.231 N/m2 deltaL/L = (1/1.6×1010 N/m2)(1375769.231 N/m2) = 8.598557692 * 10-5 (8.598557692 * 10-5) * 0.52 m = 4.47125 * 10-5 m = 4.5 * 10-5 m I'm not sure what I'm doing wrong; any help would be appreciated!