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JEE Main2003PhysicsRotational MotionActual

A particle performing uniform circular motion has angular frequency is doubled & its kinetic energy halved, then the new angular momentum is

Options

  1. AL 4
  2. B2 ~L
  3. C4 ~L
  4. DL 2

Correct answer

A. L 4

Step-by-step solution

Angular momentum 1 Angular frequency Kinetic energy L = K . E . w L ₁ ~L ₂ = ( K . E ₁ w ₁ ) w ₂ KE ₂ =4 L ₂= L 4

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