Question

Why does an elevator has more power supplied by the motor then that needed to transport passages

Answer 1

Explanation:

A lift (elevator) in a high building transports 12 passengers, each of mass 65 kg, through a vertical height of 150 m in a time of 64 s.

(i) Calculate the power needed to transport the passengers through this height.

(ii) The lift (elevator) is driven by an electric motor. State a reason, other than

friction, why the power supplied by the motor is greater than the power

needed to transport the passengers

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