[填空题]
Model a figure skater’s body a, vs zha6df-g9f;m :pis a solilc u++lym ek0.d cylinder and her arms as thin rods, making reasonable estimates for the dimensions. Then k+ um0+ l.lycecalculate 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
