A crate of mass 12 kg is pulled 15 m up a line of greatest slope of a smooth plane inclined at 25∘ 25^\circ\,25∘ to the horizontal by a force T T\,T acting parallel to the slope, as shown in the diagram below. The crate moves at a constant speed.
Calculate the work done on the crate by the pulling force TTT.
(Use g=9.8 m s−2g = 9.8\text{ m s}^{-2}g=9.8 m s−2 and give your answer to 3 significant figures.)
76.1 J76.1\text{ J}76.1 J
1600 J1600\text{ J}1600 J
746 J746\text{ J}746 J
1760 J1760\text{ J}1760 J