posted by Anonymous .
A skier of mass 65.0 kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 57.0 m up a 35° slope (assumed to be frictionless) at a constant speed of 2.0 m/s?
The vertical rise is
H = 57 sin 35 meters.
The work required to raise the skier that amount is M g H.
It does not depend upon the speed, although the required power does.