[填空题]
Model a figure skater’s b:r *hmezl7y l -e1,ctlody vht 2k8 yzb0 dnt+j6p.2qyu1 xas a solid cylinder and her arms as thin rods, making reasonable estimates for the dimensions. Then calculate the ratio of the angular speeds for a spinning skater with outstretched arms, and with arms h1yh tjt2b0pq2 uydv+z.kn x6 8eld tightly against her body.
Post time 2025-2-18 20:00:22
