[问答题]
A nonrotating cylindricaleq zlb6 +y1ob+vwh8gd2nk(0w disk of moment of inertia I is dropped ov / cm hhj.2c5xi2 ;o9ao5wdxanto an identical disk rotating at angular speed5ax5.x ch9odo ia/ 22;mcvw jh $\omega$ Assuming no external torques, what is the final common angular speed of the two disks?