The M.I. of a uniform disc about an axis passing through its centre and perpendicular to its plane is 1kgm^(2). It is rotating with an angular velocity to 100rads^(-1). A second disc of same mass and radius is joined to it coaxially. Now these two discs together continue to rotate about the same axis. Then the lose in kinetic energy in kilo joules is

The M.I. of a uniform disc about an axis passing through its centre an

1.	The M.I. of a uniform disc about an axis passing through its centre and perpendicular to its plane is 1kgm^(2). It is rotating with an angular velocity to 100rads^(-1). A second disc of same mass and radius is joined to it coaxially. Now these two discs together continue to rotate about the same axis. Then the lose in kinetic energy in kilo joules is
Answer» `2.5` `3` `3.5` `4` ANSWER :A