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MHT CET20244 May 2024Morning ShiftPhysicsRotational MotionActual

A rotating body has angular momentum ' L '. If its frequency is doubled and kinetic energy is halved, its angular momentum will be

Options

  1. AL 4
  2. BL 2
  3. C2 L
  4. D4 L

Correct answer

A. L 4

Step-by-step solution

Angular momentum of a particle performing UCM L = I ...(i) Kinetic energy, k = 1 2 I ^2 ...(ii) L = 2 k [ From (i) and (ii)] aligned & L ₁ ~L ₂ = k ₁ k ₂ ₂ ₁ & ~L ~L ₂ = 1 1 2 2 1 & ~L ₂= L 4 aligned ...(given)

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