A sledge of mass 15 kg is pulled a distance of 8 m up a line of greatest slope of a hill inclined at 25∘ 25^\circ\,25∘ to the horizontal. The sledge is pulled by a rope parallel to the slope with a constant tension of 110 N, as shown in the diagram below.
Calculate the work done against gravity as the sledge moves this distance. Use g=9.8 m s−2g = 9.8\text{ m s}^{-2}g=9.8 m s−2.
880 J880\text{ J}880 J
1070 J1070\text{ J}1070 J
497 J497\text{ J}497 J
50.7 J50.7\text{ J}50.7 J