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Q: What is the potential energy of an object of mass 40 kg when it is lifted at a height of 5m above the ground?
  • A. 200W
  • B. 2000J
  • C. 2000W
  • D. 200J
Correct Answer: Option B - (U) = mgh here, m = 40 kg, h = 5 m g = 10 m/s² Potential energy , (U) = 40 × 10 × 5 = 2000 J
B. (U) = mgh here, m = 40 kg, h = 5 m g = 10 m/s² Potential energy , (U) = 40 × 10 × 5 = 2000 J

Explanations:

(U) = mgh here, m = 40 kg, h = 5 m g = 10 m/s² Potential energy , (U) = 40 × 10 × 5 = 2000 J