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A 89.0 kg person stands on one leg and 90% of the weight is supported by the upper leg connecting the knee and hip joint-the femur. Assuming the femur is 0.640 m long and has a radius of 1.90 cm, by how much is the bone compressed?

  • Physic -

    You will need to look up Young's modulus (Y) for femur bone material.

    Then use

    deltaL = L*(stress)/Y

    Stress = M g/area

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