Two horizontal discs of different radii are free to rotate about their central vertical axes: One is given some angular velocity, the other is stationary. Their rims arc now brought in contact. There is friction between the rims. Then

Two horizontal discs A and B of radii r and 2r having moments of inertia I and 4I about their axes. Initially, disc A is rotating with omega_(0) and disc B is at rest. Their rims are now brought in contact. The discs first slip over each other at the contact but slipping finally ceases due to the fricition between them. Find the angular speeds of the discs after the slipping ceases. Also, find the loss in kinetic energy.

Two discs of radii R and 2R are pressed against each other. Initially, disc with 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 inertia of 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.

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.

Two men each of mass m stand on the rim of a horizontal circular disc, diametrically opposite to each other. The disc has a mass M and is free to rotate about a vertical axis passing through its centre of mass. Each mass start simultaneously along the rim clockwise and reaches their original starting positions on the disc. The angle turned through by disc with respect to the ground (in radian) is

Two men each of mass m stand on the rim of a horizontal circular disc, diametrically opposite to each other. The disc has a mass M and is free to rotate about a vertical axis passing through its centre of mass. Each mass start simultaneously along the rim clockwise and reaches their original starting positions on the disc. The angle turned through by disc with respect to the ground (in radian) is

A horizontal disc is rotating about a vertical axis passing through its centre. If an insect moves from centre to rim then the angular momentum of the system

A horizontal disc is rotating about a vertical axis passing through its centre. If an insect moves from centre to rim then the angular momentum of the system

A horizontal disc is rotating about a vertical axis passing through its centre. If an insect moves from centre to rim then the angular momentum of the system