Two discs of moment of inertiaI_(1) and I_(2) about their respectively axes (normal) to the disc and passing through the centre) , and rotating with angular speed omega_(1) and omega_(2) are brought into contact face to face with their axes of rotation coincident . What is the loss in kinetic energy of the system in the process ?

Two discs of moment of inertiaI_(1) and I_(2) about their respectively

1.	Two discs of moment of inertiaI_(1) and I_(2) about their respectively axes (normal) to the disc and passing through the centre) , and rotating with angular speed omega_(1) and omega_(2) are brought into contact face to face with their axes of rotation coincident . What is the loss in kinetic energy of the system in the process ?
Answer» `(I_(1) I_(2) (omega_(1) - omega_(2))^(2))/(2 (I_(1) + I_(2)))` `(I_(1) I_(2) (omega_(1) - omega_2)^(2))/((I_(1) + I_(2)))` `(I_(1) I_(2) (omega_(1) + omega_(2))^(2))/((I_(1) - I_(2)))` `(I_(1) I_(2) (omega_(1) + omega_(2))^(2))/(2 (I_(1) - I_(2)))` ANSWER :A