a cart for hauling ore out of a gold mine has a mass of 425 kg , including its load. the cart runs along a straight stretch of track that climbs a shallow 4.79∘ incline. a donkey, which is trudging along and to the side of the track, has the unenviable job of pulling the cart up the slope with a 429 n force for a distance of 127 m by means of a rope that is parallel to the slope but makes an angle of 12.3∘ with the track.model the rolling resistance of the cart as though it were sliding on the track with a coefficient of friction of 0.0171 . use ????