[填空题]
A figure skater can increase her spin rotation raff 25;rsfu;n b.3vsy v+v qfrf*;5xcy te fro7 kir/gz7, pnkm an initial rate of 1.0 rev every 2.0 s to a final 7kikg n,p7rz/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? $kg \cdot m^2$