Each of the two solid disk wheels weighs 20 lb, and the inner solid cylinder weighs 16 l...

Each of the two solid disk wheels weighs 20 lb, and the inner solid cylinder weighs 16 lb. The disk wheels and the inner disk are mounted on the small central shaft O-O and can rotate independently of each other. Friction in the shaft bearings is negligible, whereas friction between the incline and the large disk wheels is sufficient to prevent slippage of the wheels. Determine the acceleration of the center O after the assembly is released on the 10° incline. The cord wrapped securely around the inner cylinder is fastened to point A.