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NEET AIPMT SOLVED PAPER 2002

  • question_answer
                    A disc is rotating with angular velocity \[\omega \]. If a child sits on it, what is conserved?                            

    A)                 Linear momentum                                         

    B)                 Angular momentum

    C)                 Kinetic energy                                  

    D)                 Moment of inertia

    Correct Answer: B

    Solution :

                    If no external torque is applied on the system then angular momentum of the system remains constant. When a child sits on rotating disc, then no torque is applied (weight of child acts downward), so angular momentum will remain conserved.


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