the record of 203.1 km/h for speed skiing set by franz weber at velocity peak in colorado was achieved in a mountain slope inclined downward at 51 degrees. at this speed, the force of friction (air and sliding friction) balances the pull of gravity along the slope, so the motion proceeds at constant velocity.
a) what is the rate at which gravity does work on the skier? assume that the mass of the skier is 75 kg.
b) what is the rate at which sliding friction does work? assume that the coefficient of friction is = 0.03. c) what is the rate at which air friction does work?