Physics
posted by Demere .
Could someone please explain how you get this answer???
A skier with a mass of 60.0 kg pushes off with a horizontal speed of 3.0 m/s from the top of a snow covered hill. As he slides down the hill, his height decreases by 42 m over a distance of 100 m of travel. How much will his kinetic energy increase by the time he reaches the bottom of the hill (assuming no friction)?

Change in Ke is equal to the loss of potential energy
m g h = 60 * 9.81 * 42 Joules