What is his speed at the instant his feet touch the ground?

Question

A 75.0- man steps off a platform 3.10 above the ground. He keeps his legs straight as he falls, but at the moment his feet touch the ground his knees begin to bend, and, treated as a particle, he moves an additional 0.60 before coming to rest.

Answer 1

I'm guessing that you mean 3.1 meters above the ground.
v = √(2gx) where v is m/s, g is 9.8 m/s² and x is distance, so
v = √(2 * 9.8 * 3.1) = 7.919 w/s

Doug