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Q: A man puts 13kg object on his head by raising the object 1.5m above from the surface of earth. Then work done will be: (g=10ms⁻²)
  • A. 195J
  • B. 100N
  • C. 150J
  • D. 140J
Correct Answer: Option A - The work done by the man is equal to the potential energy stored in an object. Work done by the man = Potential energy of object W = mgh [Given, m = 13kg, g = 10ms⁻², h = 1.5m] W = 13x10x1.5 = 195J
A. The work done by the man is equal to the potential energy stored in an object. Work done by the man = Potential energy of object W = mgh [Given, m = 13kg, g = 10ms⁻², h = 1.5m] W = 13x10x1.5 = 195J

Explanations:

The work done by the man is equal to the potential energy stored in an object. Work done by the man = Potential energy of object W = mgh [Given, m = 13kg, g = 10ms⁻², h = 1.5m] W = 13x10x1.5 = 195J