In the situation below, a tractor pulls a 850 sledge along a ramp with height ℎ = 1 and slope = 30 °. If the tractor applies a constant force to the sledge = 6750 , over an angle = 36.9 °, determine the total work performed by all forces on the sledge to move it along the ramp. The coefficient of kinetic friction between the sledge and the plane is = 0.3. Tip: for the calculation, remember that only the components of the forces that are parallel to the direction of displacement contribute to the work. Disregard the dimensions of the sled.