When you fall, that is potential energy stored via gravity turning into kinetic energy. When you land, that kinetic energy is then turned into thermal energy.

When you fall, that is potential energy stored via gravity turning into kinetic energy. When you land, that kinetic energy is then turned into thermal energy. If you're interested, this would be physics. Physics 1 (usually kinematics) isn't bad if you like math, though I think physics 2 and beyond start to be demanding