Verified Solution • 2025–26 Session moderate

QAIPMT-2010-Ph-1975: NEET 2010 Physics - Class 11 AIPMT-2010-Ph-1975 Solution: A thin circular ring of mass M and radius r is rotating about…

A thin circular ring of mass M and radius r is rotating about its axis with constant angular velocity ω\omega. Two objects each of mass m are attached gently to the opposite ends of a diameter of the ring. The ring now rotates with angular velocity given by

Multiple Choice Options

  • A (M+2m)ω2m\frac{(M+2m)\omega}{2m}
  • B 2MωM+2m\frac{2M\omega}{M+2m}
  • C (M+2m)ωM\frac{(M+2m)\omega}{M}
  • D MωM+2m\frac{M\omega}{M+2m}

Step-by-Step Verified Solution

As no external torque is acting about the axis, angular momentum of system remains conserved. I 1 _ 1 = I 2 _ 2 _ _ 2 = I 1 _ 1 ( M + 2 m ) r 2 = M _ ( M + 2 m )

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