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Question 6163
NEET Physics · Hard

System of Particles & Rotational Motion: Rotational Dynamics MCQ

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

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Rotational DynamicsHardQuestion 6163

Question

Two discs (I₁, I₂, ω₁, 0) are pressed together. Combined ω:
  1. A
    (I₁ω₁+I₂×0)/(I₁+I₂)
  2. B
    I₁ω₁/(I₁+I₂)
    Correct
  3. C
    ω₁/2
  4. D
    I₁ω₁/I₂

Correct answer

I₁ω₁/(I₁+I₂)

Explanation

Conservation of L: I₁ω₁ = (I₁+I₂)ω. ω = I₁ω₁/(I₁+I₂).

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