a load of mass120kg is raised vertically through a height of 2m in 30s by...

WAEC 2002

a load of mass120kg 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]

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

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Correct Answer: Option B

Explanation

p = \(\frac{mgh}{t} = \frac{120 \times 10 \times 2}{30} = 80W\)

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a load of mass120kg is raised vertically through a height of 2m in 30s by...

Correct Answer: Option B

Explanation

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