[填空题]
Model a figure skater’s body as a solid ckmg 60 s in*y5bo(d1gxylinder and her xdyy4: psh (jli0(k 2l-w4 cxa; ab*xvarms as thin rods, making reasonable estimates for the dimensions. T*4abc 20lx;p vy4w(sxhx(k -yid:ajlhen calculate the ratio of the angular speeds for a spinning skater with outstretched arms, and with arms held tightly against her body.
Post time 2025-2-18 20:00:22
