A constant power is suppied to a rotating disc. The relationship between the angular velocity `(omega)` of the disc and number of rotations `(n)` made by the disc is governed by

A disc is rotating with angular velocity omega . If a child sits on it, what is conserved?

A disc rotates with angular velocity omega and kinetic energy E . Then its angular momentum

A disc is rotaing with an angular velocity omega_(0) . A constant retarding torque is applied on it to stop the disc. The angular velocity becomes (omega_(0))/(2) after n rotations. How many more rotations will it make before coming to rest ?

A circular disc is rotating about its own axis at a uniform angular velocity omega . The disc is subjected to uniform angular retardation by which its angular velocity is decreased to omega/2 during 120 rotations. The number of rotations further made by it before coming to rest is

A cockroach is moving with velocity v in anticlockwise direction on the rim of a disc of radius R of mass m . The moment of inertia of the disc about the axis is I and it is rotating in clockwise direction with an angular velocity omega . If the cockroach stops, the angular velocity of the 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 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

Two discs of radii R and 2R are pressed against eachother. Initially, disc wit radius R is rotating with angular velocity omega and other disc is stationary. Both discs are hinged at their respective centres and are free to rotate about them. Moment of inertiaof smaller disc is I and of bigger disc is 2I about their respective axis of rotation. Find the angular velocity of bigger disc after long time.

A disc of mass m has a charge Q distributed on its surface. It is rotating about an XX' with a angular velocity omega . The force acting on the disc is

When a disc rotates with uniform angular velocity, which of the following is not true ?