The normal force of the ground on the foot can reach three times a runner's body...

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The normal force of the ground on the foot can reach three times a runner's body...

The normal force of the ground on the foot can reach three times a runner's body weight when the foot strikes the pavement.

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Part A

By what amount does the 52-cm-long femur of an 83 kg runner compress at this moment? The cross-section area of the bone of the femur can be taken as 5.2×10−4m2 and its Young's modulus is 1.6×1010N/m2.

Express your answer to two significant figures and include the appropriate units.

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