NEET2003PhysicsRotational MotionActual
A thin circular ring of Mass M and radius r is rotating about its axis with a constant angular velocity . Four objects each of mass m , are kept gently to the opposite ends of two perpendicular diameters of the ring. The angular velocity of the ring will be:
Options
- AM 4 m
- BM M+4 m
- C(M+4 m) M
- D(M-4 m) M+4 m
Correct answer
B. M M+4 m
Step-by-step solution
According to law of conservation of angular momentum aligned & M r^2 = (M r^2+4 m r^2 ) ^ & ^ = M M+4 m aligned