With the gears initially at rest and the couple M equal to zero, the forces exerted by t...

With the gears initially at rest and the couple M equal to zero, the forces exerted by the frame on the shafts of the gears at A and B are 30 and 16 lb, respectively, both upward to support the weights of the two gears. A couple exerted by the frame on the shafts during the 4-sec interval. Isolate the two gears together as the system.