An ice skater having moment of inertia `l` rotating with angular speed `omega` suddenly opens her arms, which reduces her angular velocity to `(omega)/(4)`. Calculate the change in moment of inertia of the dancer.

A torque T acts on a body of moment of inertia l rotating with angular speed omega . It will be stopped just after time

A torque T acts on a body of moment of inertia l rotating with angular speed omega . It will be stopped just after time

Does the moment of inertia of abody change with the speed of rotation ?

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 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 hollow sphere partly filled with water has moment of inertia I when it is rotating about its own axis at an angular velocity omega . If its angular velocity is doubled then its moment of inertia becomes

The moment of inertia of a body moving with angular velocity omega decreases from l to (l)/(3) without any external torque. Calculate the new angular velocity of the body.

The moment of inertia of a body moving with angular velocity omega decreases from l to (l)/(3) without any external torque. Calculate the new angular velocity of the body.

The moment of inertia of a body moving with angular velocity omega decreases from I to (I)/(3) without any external torque. Calculate the new angular velocity of the body.

(A) : When there is no external torque moment of inertia of a rotating body changes, its angular momentum remain conserved, but its kinetic energy changes. (R ) : Angular momentum does not depend upon moment of inertia of the body.