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Work, Power and Energy: Gravitational PE — Change MCQ

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Gravitational PE — ChangeMediumQuestion 30417

Question

A 2 kg book is lifted from the floor (0 m) to a shelf 1.5 m high. Change in gravitational PE is: (g = 10 m/s²)
  1. A
    15 J
  2. B
    30 J
    Correct
  3. C
    3 J
  4. D
    20 J

Correct answer

30 J

Explanation

ΔPE = mgh = 2×10×1.5 = 30 J.

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