Physics

A car (m = 610.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a height, h = 49.0 m. Find the average power the engine must deliver to reach a speed of 24.7 m/s at the top of the hill in 20.5 s(NEGLECT frictional losses: air and rolling, ...)

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  1. m g h + (1/2) m v^2 = energy gain during trip

    = 610 * 9.81 * 49 + (1/2) * 610 * 24.7^2 in Joules

    divide that energy gain by 20.5 seconds to get Watts

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