A disc with moment of inertia`I_(1)`, is rotating with an angular velocity `omega_(1)` about a fixed axis. Another coaxial disc with moment of inertia `I_(2)`, which is at rest is gently placed on the first disc along the axis. Due to friction discs slips against each other and after some time both disc start rotating with a common angular velocity. Find this common angular velocity.

A disc of moment of inertia I_(1) is rotating freely with angular speed omega_(1) when another non-rotating disc of moment of inertia I_(2) is dropped on it. The two discs then rotate as one unit. Find the final angular speed.

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

A disc with moment of inertial I is rotating with some angular speed. Second disc is initially at rest. Now second disc with moment of inertia 3I is placed on first disc and starts rotating. Find loss of kinetic energy in fraction

A heavy disc is rotating with uniform angular velocity omega about its own axis. A piece of wax sticks to it. The angular velocity of the disc will

A circular disc of moment of inertia I_(t) is rotating in a horizontal plane about its symmetry axis with a constant angular velocity omega_(i) . Another disc of moment of inertia I_(b) is dropped co-axially onto the rotating disc. Initially, the second disc has zero angular speed. Eventually, both the discs rotate with a constant angular speed omega_(f) . Calculate the energy lost by the initially rotating disc due to friction.

A horizontal disc rotates freely about a vertical axis through its centre. A ring, having the same mass and radius as the disc, is now gently placed on the disc. After some time, the two rotate with a common angular velocity, then

An ant is sitting at the edge of a rotating disc. If the ant reaches the other end, after moving along the diameter, the angular velocity of the disc will:-

A disc of mass m and radius r is rotating with angular velocity, on a frictionless horizontal plane about a vertical axis passing through its centre. A ring of same mass and radius is gently placed on it in such a way that centres of both coincide. After some time it is found that both attain a common angular velocity

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