[填空题]
Calculate the momentukh w i:c idco fm4,55c*t32wo of inertia of a bicycle ab;i4vks;+xt -dn0 ev qu2mt9 wheel 66.7 cm in diameter. The rim and txv vqt;e d2it sb;9uan+m40k-ire have a combined mass of 1.25 kg. The mass of the hub can be ignored (why?). $kg \cdot m^2$