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

Physics 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]

  • 60W
  • 80W checkmark
  • 100W
  • 120W

The correct answer is: B

Explanation

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