A load of mass 120kg is raised vertically through a height of 2m in 30s by a machine whose efficiency is 100%. Calculate the power generated by the machine. [g = 10ms‾²]

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A. 60W
B. 80W
C. 100W
D. 120W

Correct Answer: Option B

B. 80W

Explanation

p = mgh/t=(120×10×2)/30 = 80W

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