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MHT CET202013 Oct 2020Morning ShiftPhysicsRotational MotionActual

Two bodies have their moments of inertia I and 2I respectively about their axes of rotation. If their kinetic energies of rotation are equal, their angular momenta will be in the ratio

Options

  1. A2: 1
  2. B1: 2 2
  3. C1: 2
  4. D1: 2

Correct answer

C. 1: 2

Step-by-step solution

array l ( kE )₁=( kE )₂ 1 2 I ₁²= 1 2 (2 I ) ₂² ₁² ₂² =2 ₁ ₂ = 2 array Ratio of angular momenta = I ₁ 2 I ₂ = 1 2 ₁ ₂ = 1 2

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