What would cause the knocking sound from the rear passenger-side wheel area? on 1994 Oldsmobile Cutlass Supreme

The knocking just started recently in the rear passenger-side wheel area and I am wondering if it is the bearings or something else. It knocks when at low-medium speed.

Asked by for the 1994 Oldsmobile Cutlass Supreme
This could be a loose wheel/lug nuts(!), a brake problem or a bearing problem. Have a reputable shop check it out for you. A test drive by a qualified technician may prove useful.