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Average Force Exerted by Ground if Man Falls out of a Window

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"A 74.3 kg man steps out a window and falls (from rest) 1.01 m to a sidewalk. If the man falls with his knees and ankles locked, the only cushion for his fall is a 0.488 cm give in the pads of his feet. Calculate the average force exerted on him by the ground in this situation. This average force is sufficient to cause cartilage damage in the joints or to break bones."

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Solution Summary

With good explanations and calculations, the problem is solved. The average force exerted by ground if a man falls of a window.

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m = 74.3 kg
h = 1.01 m
cushion thickness = 0.488 cm = 0.00488 m
h_eff = 1.01 - 0.00488 = 1.00512 m
When his cushion toches the ground, the man will have maximum ...

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  • BEng, Allahabad University, India
  • MSc , Pune University, India
  • PhD (IP), Pune University, India
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