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The loaded cab of an elevator has a mass...

The loaded cab of an elevator has a mass of `5.0 xx 10^(3)` kg and moves 210 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab ?

Text Solution

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The correct Answer is:
`4.5xx10^(5)` W
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Knowledge Check

  • An elevator with passengers has a total mass of 800 kg and moves slowly a vertical distance of 20.0 m in 10.0s . What is the average power expended in lifting this mass ?

    A
    `1.57xx10^(2) W`
    B
    `1.57xx10^(4) W`
    C
    `1.57xx10^(5) W`
    D
    `1.57xx10^(6) W`

  • A woman stands on a scale in a moving elevator. Her mass is 60.0 kg, and the combined mass of the elevator and scale is an additional 815 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9410 N. What does the scale read during the acceleration ?

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    588 N
    B
    606 N
    C
    645 N
    D
    720 N

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