[填空题]
A figure skater can increase her spin ca qo0.:7+qjwfb lw *zbg6lca*y2 h- yrotation rate frt7ckgl-7:jvf om an initial rate of 1.0 rev evg klfj77-cv t:ery 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? $kg \cdot m^2$