Question: John steps off a platform onto the floor from a height of 0.9 m. If John has a mass of 104.1 kg and lands

John steps off a platform onto the floor from a height of

John steps off a platform onto the floor from a height of 0.9 m. If John has a mass of 104.1 kg and lands without bending his knees, his knee joints compress by 0.64 cm. Calculate the force acting on his knee joints. Note that since John steps off the platform, his initial y-velocity is 0 m/s. Considering that 1000 N is roughly equal to 225 lbs, do you think this hurts John's knees?)

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