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NEET2016PhysicsRotational MotionActual

Two rotating bodies, A and B of masses, m and 2 m with moments of inertia. I A and I B   I B > I A have equal kinetic energy of rotation. If, L A and L B be their angular momenta, respectively, then,

Options

  1. AL A = L B 2
  2. BL A = 2 L B
  3. CL B > L A
  4. DL A > L B

Correct answer

C. L B > L A

Step-by-step solution

E = L 2 2 I . ⇒ E A = E B ⇒ L A 2 2 I A = L B 2 2 I B . I B > I A ⇒ L B > L A .

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