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Rigid Body Dynamics: Conservation of Angular Momentum MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Conservation of Angular MomentumMediumQuestion 30312

Question

A figure skater spinning with arms outstretched pulls arms inward. Her angular speed:
  1. A
    Decreases
  2. B
    Stays same
  3. C
    Increases
    Correct
  4. D
    Becomes zero

Correct answer

Increases

Explanation

With no external torque, angular momentum L = Iω is conserved. Pulling arms in decreases I, so ω must increase.

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