Question

A cart for hauling ore out of a gold mine has a mass of 429 kg , including its load. The cart runs along a straight stretch of track that climbs a shallow 4.63∘ 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 431 N force for a distance of 131 m by means of a rope that is parallel to the slope but makes an angle of 14.9∘ with the track. The coefficient of friction for the cart's wheels on the track is 0.0183 . Use ?=9.81 m/s2 , and note that angle A in the image is the angle of the incline while angle B is the angle the rope makes with the track. Image of a donkey attached by a rope to an ore cart rolling on train tracks. Angle diagrams indicate that angle A is the angle the track makes with horizontal ground and anlge B is the angle the rope makes with the track. Find the work ?d that the donkey performs on the cart during this process. ?d= J Find the work ?g that the force of gravity performs on the cart during this process. ?g= J Calculate the work ?f done on the cart by friction during this process. ?f=

Answer 1