[填空题]
A figure skater can increas f* lz1bh4x9wie heryx.a,aag 6c0tl +6vxn spin rotation rate from an initial rate of 1.0 xac a0 gv,y.6alxt+n6rev every 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? $kg \cdot m^2$