A sledge of mass 15 kg is pulled a distance of 12 m up a snow-covered slope inclined at 20∘ 20^\circ\,20∘ to the horizontal. The pulling force has a magnitude of 80 N and acts at an angle of 15∘ 15^\circ\,15∘ to the slope, as shown in the diagram below.
Calculate the work done by the pulling force during this displacement, to 3 significant figures.
960 J960\text{ J}960 J
927 J927\text{ J}927 J
902 J902\text{ J}902 J
786 J786\text{ J}786 J