[填空题]
Model a figure skater’s body as a solid j :w 2jri7moz1 gp blk,zr:3w/cylinder and her a:w8dx:d(xwv pnx( w y,rms as thin rods, making reasonable estimates for the dimensions. Then calculate the 8wwxyv:(d(xw,n dx:p 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
