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