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Question 30483
JEE Physics · Hard

Work, Power and Energy: Advanced — Power in Rotational System MCQ

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Advanced — Power in Rotational SystemHardQuestion 30483

Question

A motor rotates a wheel (I = 0.5 kg·m²) from 0 to 60 rad/s in 5 s uniformly. Average power of the motor is:
  1. A
    90 W
  2. B
    180 W
    Correct
  3. C
    360 W
  4. D
    45 W

Correct answer

180 W

Explanation

Work done = ΔKE = ½×0.5×3600 = 900 J. Power = 900/5 = 180 W.

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