[问答题]
A nonrotating cylindricalfqos9k(h, :)gx u4t1het+/ph bd7ue b:xr5sj disk of moment of inerti.+(ki8.9i c cluvbv ux t05:cceen ae *56zuaea I is dropped onto an identical disk rotlu*8c vaeb6uk.euv x9n +t acii:ze.e5(c50cating at angular speed $\omega$ Assuming no external torques, what is the final common angular speed of the two disks?