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MHT CET202122 Sep 2021Morning ShiftPhysicsRotational MotionActual

Two rotating bodies P and Q of masses ' m ' with moment of inertia I_P and I_Q (I_Q>I_P ) have equal Kinetic energy of rotation. If L_P and L_Q be their angular momenta respectively then

Options

  1. AL _ Q =0
  2. BL _ Q = L _ P
  3. CL _ Q < L _ P
  4. DL _ Q > L _ P

Correct answer

D. L _ Q > L _ P

Step-by-step solution

aligned & Kinetic energy = L _ P ^2 2 I _ P = L _ Q ^2 LI _ Q & L _ Q ^2 ~L _ P ^2 = I _ Q I _ P & I _ Q > I _ P we get L _ Q > L _ P aligned

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