[问答题]
A nonrotating cylindc+w 9l+ook 29z 1ymyqxrical disk of moment of inertia I is dropped x4zk tl4 kzn6qp ,j3jv(b3 l(wonto an identical di( zw6l4b(t3p j,3n4vl x kzkqjsk rotating at angular speed $\omega$ Assuming no external torques, what is the final common angular speed of the two disks?