A 15 kg sled is pulled up a 5.0 m long incline that makes an angle of 20° with the…
PHYSICS · Subjective · CBSE · Physics · Laws of Motion · Laws of Motion
Problem
A 15 kg sled is pulled up a 5.0 m long incline that makes an angle of 20° with the horizontal. The coefficient of kinetic friction on the incline is 0.25. A rope exerts a constant 85 N force parallel to the incline, and the sled moves up at constant speed. At the top, the rope is released; the sled slides back down the same incline and then continues across a rough horizontal surface for 5.0 m where the coefficient of kinetic friction is 0.10 before coming to rest. Determine what percentage of the work done by the rope is ultimately converted into thermal energy in the sled–surface system.