Question

By means of towrope, a girl pulls a sled with firewood along a level, icy road. The coefficient of friction between the sled and the road is μk = 0.1, and the mass of the sled plus its load is 120 kg. The towrope is attached to the front end of the sled and makes an angle of 35° with the horizontal. How much work must the girl do on the sled to pull it 1.1 km at a constant speed?

Answer 1