A boy comes running and sits on a rotating platform. What is conserved?

Options :
  1. linear momentum
  2. kinetic energy
  3. angular momentum
  4. None of the above
Answer and Explanation :-

Answer: Option 4


K.E. or momentum = f (m, v) Since the linear velocity v and so the angular velocity of boy is changing . Thus K.e. and momentum of boy are not conserved.

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He who does not cherish life, does not deserve to be among the living. ?
-Luis Marques Book of Orion - Liber Aeternus