JEE Main2006PhysicsRotational MotionActual
A thin circular ring of mass m and radius R is rotating about its axis with a constant angular velocity . Two objects each of mass M are attached gently to the opposite ends of a diameter of the ring. The ring now rotates with an angular velocity ^ =
Options
- Am ( m +2 M )
- B( m +2 M ) m
- C(m-2 M) (m+2 M)
- Dm (m+M)
Correct answer
A. m ( m +2 M )
Step-by-step solution
L_i=L_fm R R^2 = (m R^2+2 M R^2 ) ^ ^ = ( m m+2 M )