A-LevelMathematicsMechanicsOct/Nov 2021Paper 4 Q57 Marks
A railway engine of mass 75 000 kg is moving up a straight hill inclined at an angle α to the horizontal, where sin α = 0.01. The engine is travelling at a constant speed of 30 ms⁻¹. The engine is working at 960 kW. There is a constant force resisting the motion of the engine.
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