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Determine the work done by an electric motor lifting an elevator and its occupants weighing 2,166 lb from the first to the
fifth floor. Assume a distance of 13 ft between each floor. Compute the power requirements for the motor to go from the
first to the fifth floor in the following times. Express your results in horsepower (1 hp
550 ft Ib/s).
(a) 5 s
x hp
(b) 8 s
hp

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