Energy is a conserved quantity and Quantifying gravitational potential and kinetic energies
Bone break The tibia bone in the lower leg of an adult human will break if the compressive force on it exceeds about 4 X 105 N (we assume that the ankle is pushing up). Suppose that you step off a chair that is 0.40 m above the floor. If landing stiff-legged on the surface below, what minimum stopping distance do you need to avoid breaking your tibias? Indicate any assumptions you made in your answer to this question.
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