[填空题]
A figure skater can increase her spin r s3xhdw tb::7ootation rtq1 cmsd/wy(5 n;yok;ate from an initial rate of 1.0 rev every 2.0 s to a final rate kqsc m5;/1d;yoynt( w 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? $kg \cdot m^2$