[填空题]
A figure skater can incrr1 n)vr7b nkehee9h1fwvpb9i )m9 :c48-s/j ii cv(ziease her spin rotation rate from an initial rate of 1.0 rev evei zsj8-ci(/viry 2.0 s to a final rate of 3 $rev/s$ If her initial moment of inertia was 4.6 kg*$m^2$ what is her final moment of inertia? How does she physically accomplish this change? $kg \cdot m^2$