Initial angular velocity of a circular disc of mass … is … Then two small spheres of mass … are attached gently to diametrically opposite points on the edge of the disc. What is the final angular velocity of the disc?

Option C. When two small spheres of mass … are attached gently, the external torque, about the axis of rotation, is zero.

Rotational Motion

JEE Main 2002 · Annual, Paper 1 · Q8038

PhysicsMedium49×since 2002Q8038

Initial angular velocity of a circular disc of mass

M

{\omega _1}.

Then two small spheres of mass

m

are attached gently to diametrically opposite points on the edge of the disc. What is the final angular velocity of the disc?

JEE Main 2002 · Annual, Paper 1 · Q8038

PhysicsMedium49×since 2002Q8038

Initial angular velocity of a circular disc of mass

M

{\omega _1}.

Then two small spheres of mass

m

are attached gently to diametrically opposite points on the edge of the disc. What is the final angular velocity of the disc?