[问答题]
A nonrotating cylindrical disk 4ft j-x0zx9t ivb/ eq/ui(es-of moment of inertia I is dropp+5mp5l56q yz7 k):aev 7nk wgirwp8yfed onto an identical di7p v ym w5k5:7 il)a5z rpfye+k6nqwg8sk rotating at angular speed $\omega$ Assuming no external torques, what is the final common angular speed of the two disks?