[问答题]
A nonrotating cylindrical disk of momen8tcb/1l ,ehfz : -swqvt of inertia I is dropped onj* 1. t9c5.ejrty5jprdv o utemgo9; 1to an identical disk rotating at r1u rec9g1 e*t;5oj jt .opj.m yvd5t9angular speed $\omega$ Assuming no external torques, what is the final common angular speed of the two disks?