Two disks are rotating about the same axis. Disk A has a moment
of inertia of 3.7 kg · m2 and
an angular velocity of +7.8 rad/s. Disk B is rotating
with an angular velocity of -9.6 rad/s. The two disks are
then linked together without the aid of any external torques, so
that they rotate as a single unit with an angular velocity
of -2.2 rad/s. The axis of rotation for this unit is the
same as that for the separate disks. What is the moment of inertia
of disk B?
_______ kg*m^2