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Asked Dec 17, 2019
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An elevator can carry a maximum load of 1168 kg (including the mass of the elevator car). The elevator has an 801-kg counterweight that always moves with the same speed but in the opposite direction to the car. Here X = 1168 What is the average power that must be delivered by the motor to carry the maximum load up 37.5 m in 58.0 s? answer in  kW

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The weight pf the counter drops down a height h when the elevator moves up a height. So the elevator gains potential energy an...

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W = gain in potential energy of the elevator -loss in potential energy of counter weight = m,gh – m.gh = (m. – m.)gh

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