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Rigid Body Dynamics: Angular Acceleration MCQ

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Angular AccelerationMediumQuestion 30349

Question

A disc rotates from rest with constant angular acceleration α = 3 rad/s². After 4 s, the angular velocity is:
  1. A
    3 rad/s
  2. B
    12 rad/s
    Correct
  3. C
    6 rad/s
  4. D
    48 rad/s

Correct answer

12 rad/s

Explanation

ω = ω₀ + αt = 0 + 3×4 = 12 rad/s.

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