Question

How much does the femur shorten when a 70-kg person stands on one foot? Assume that in the absence of stress, the femur has a length of 0.5 m. The femur’s cross-sectional area can be modeled as a hollow circular tube with internal diameter d₁ = 2.5 cm and external diameter d₂ = 3.3 cm. Young’s modulus for bone compression is 9 × 10⁹ N/m².

Answer 1

Date Peg of Man Tnidial length Internal dia 2.5cm EAternal oli' 9.3 c.mm 70 K werght of Man 2 7Dx 9-81- 686.7 N Idd Ckoss-secth on Arcea of femu boue T(3.32-25)x m2 (/00)2 3.64 x10-m Stess ()Ex strain (e) By HOOK 's Law A 4QE PR AE 686.7 x0.5 3.64X 169xl0 10.47x10 m m 0.1047 mm 1 chauge in