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How much power is required a lift a bod...

How much power is required a lift a body of mass 50 kg to a height of 120 m in 1 minute ? `(g = 9.8 m//s^(2))` .

A

100 W

B

`9.8` W

C

980 W

D

1980 W

Text Solution

Verified by Experts

The correct Answer is:
C
Power `P = (mgh)/t `
` (50 xx 9.8 xx120)/60`
` :. P = 980 W`
`m = 50 kg `
`g = 9.8 m//s^(2)`
` h = 120 m `
t = 1 minute
= 60 seconds
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Knowledge Check

  • If a body of mass 100 kg takes hight 60 m in 1 minute how much power is needed ? ( g = 9.8 m//s^(-2))

    A
    100 W
    B
    980 W
    C
    `9.8` W
    D
    1980 W

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