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[wufwugy]

How would you find a rough estimate of what his muscle strength needs to be? Something like calculating the force at which he would hit the ground, which would be approximately the same weight he would need to be able to squat? I know I'm not thinking of the units correctly. I really don't know physics. I just wanna know what kind of strength it would take to land from free fall like the superheroes do in the movies. Would they have to be able to squat 2k pounds, 20k pounds, or what?

[MadMojoMonkey]

How would you find a rough estimate of what his muscle strength needs to be? Something like calculating the force at which he would hit the ground, which would be approximately the same weight he would need to be able to squat? I know I'm not thinking of the units correctly. I really don't know physics. I just wanna know what kind of strength it would take to land from free fall like the superheroes do in the movies. Would they have to be able to squat 2k pounds, 20k pounds, or what?

@100 kg and 110 m/s, that's 11,000 kg*m/s of momentum to absorb.

I've stipulated 3.3 seconds to absorb it.
Newton's 2nd says F = ma or - more properly - F = dp/dt. So we know dp and dt, just plug and chug
F = (11,000 kg*m/s) / (3.3 s) = 3,333 N ~= 750 lb (force)

A more realistic time, assuming a super-brain that doesn't require such delicate treatment, a time span of 0.25 seconds makes more sense. Same math, different dt.
F = (11,000 kg*m/s) / (0.25 s) = 44 kN ~= 9,900 lb (force)