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An elevator with passengers has a total ...

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`

Text Solution

Verified by Experts

The correct Answer is:
B
Average power`=(mg(Deltah))/(Deltah)`
`=(800xx9.8xx20)/(10)=1.57xx10^(4)=1.57xx10^(4)`
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