A disc of mass 4M and radius R is rotating freely with angular velocity `omega_(0)=18(rad)/s` about its axis, which is fixed and vertical.A small particle of Mass M is placed at periphery of the disc gently and it starts rotating with disc,then new angular speed of disc in rad/s is

A uniform disc of radius a and mass m, is rotating freely with angular speed omega in a horizontal plane about a smooth fixed vertical axis through its centre. A particle, also of mass m, is suddenly attached to the rim of the disc of the disc and rotates with it. The new angular speed is

A uniform circular disc of mass 50kg and radius 0.4 m is rotating with an angular velocity of 10 rad s^(-1) about its own axis, which is vertical. Two uniform circular rings, each of mass 6.25 kg and radius 0.2 m, are gently placed symmetrically on the disc in such a manner that they are touching each other along the axis of the disc and are horizontal. Assume that the friction is large enough such that the rings are at rest relative to the disc and the system rotates about the original axis. The new angular velocity (in red s^(-1)) of the system is

A disc of mass m and radius R rotating with angular speed omega_(0) is placed on a rough surface (co-officient of friction =mu ). Then

A disc of mass 1 kg and radius 0.1 m is rotating with angular velocity 20 rad/s. What is angular velocity (in rad/s) if a mass of 0.5 kg is put on the circumference of the disc ?

A disc of mass 1 kg and radius 0.1 m is rotating with angular velocity "20 rad s"^(-1) . What is angular velocity, if a mass of 0.25 kg is put on periphery of the disc?

A disc of mass 2 kg and radius 0.2 m is rotating with angular velocity 30 "rad s"^(-1) . What is angular velocity, if a mass of 0.25 kg is put on periphery of the disc ?

A disc of mass m, radius r and carrying charge q, is rotating with angular speed omega about an axis passing through its centre and perpendicular to its plane. Calculate its magnetic moment

A disc of mass m, radius r and carrying charge q, is rotating with angular speed omega about an axis passing through its centre and perpendicular to its plane. Calculate its magnetic moment

A circular disc of mass M and radius R is rotating about its axis with angular speed If about another stationary disc having radius omega_1 . R/2 and same mass M is dropped co- axially on to the rotating disc. Gradually both discs attain constant angular speed omega_2 . The energy lost in the process is p% of the initial energy . Value of p is ........

A disc of mass M and Radius R is rolling with an angular speed omega on the horizontal plane. The magnitude of angular momentum of the disc about origin is: