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Unilorin Post-UTME Physics 2022 (Model questions) Question 11

Question 11

Work, Energy and Power

Find the potential energy of an object of mass 10kg placed on a building floor 10m above the ground level. [g = 10ms−2]

  1. A.10,000J
  2. B.5,000J
  3. C.100J
  4. D.1,000J
Show the answer and explanation

Answer: D (1,000J)

Explanation

P.E. = mgh = 10 × 10 × 10 = 1000 J.