[填空题]
Calculate the moment of inertia of a bicy74.uqu9az b r9pq+yu hcle wheel 6d.pek8- fp jw*ft -o axkl.(8z6.7 cm in diameter. The rim and tire have a combined mass of 1.25 kg. The mass of the hub can be ignored (why?)8od.8 a(ek- .p fz*kf-lxjpwt. $kg \cdot m^2$