A circular disc is rotating without friction about its natural axis with an angular velocity `omega`. Another circular disc of same material and thickness but half the raduis is gently placed over it coaxially. The angular velocity of composite disc will be

A thin uniform circular disc of mass M and radius R is rotating in a horizontal plane about an axis passing through its centre and perpendicular to the plane with angular velocity omega . Another disc of same mass but half the radius is gently placed over it coaxially. The angular speed ofthe composite disc will be:

A circular disc is rotating about its own axis, the direction of its angular momentum is

A thin uniform circular disc of mass M and radius R is rotating in a horizontal plane about an axis passing through its centre and perpendicular to the plane with n angular velocity omega another disc of one forth mass and same dimension is gently placed over it coaxially, the angular speed of the composite disc will be ............

A thin uniform circular disc of mass M and radius R is rotating in a horizontal plane about an axis perpendicular to the plane at an angular velocity omega . Another disc of mass M / 3 but same radius is placed gently on the first disc coaxially . the angular velocity of the system now is

Auniform disc of mass M and radius R is rotating in a horizontal plane about anaxis perpendicular to its plane with an angular velocity omega . Another disc of mass M/3 and radius R/2 is placed gently on the first disc coaxially. Then final angular velocity of the system is

A circular disc is rotation about its natural axis with angular velocity of 10rads^(-1) . A second disc of same mass is joined to it coaxially. If the radius of disc is half of the radius of the first, then they together rotate with an angular velocity of