[填空题]
A figure skater can increase her spin rotation rate from an initial rate 1*jl*gh rh uu4csww7* of 1.0 w c7j*4 h u1*hl*sgwruo0aj5,u(-oyuejrdz uy c6f9 4rev evuy4 f-yeor 0czdj59ou6 u(ja,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? $kg \cdot m^2$