[填空题]
A figure skater can increase hebcm7a x jeb dr1x.zq a.xdkeo*ge22+ :q4, h(ir sag+4uo;* fh.npij3pt h*eg z/pin rotation rate from an initial rate of 1.0 rev every 2.0 s to a fpu+.t/gg3hzih eo a nf;pj*4 *inal 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? $kg \cdot m^2$