Disk A has a mass of 6 kg and an initial angular velocity of 360 rpm clockwise; disk B has a mass of 3 kg and is initially at rest. The disks are brought together by applying a horizontal force of magnitude 20 N to the axle of disk A. Knowing that μ_k = 0.15 between the disks and neglecting bearing friction, determine 

(a) The angular acceleration of each disk, 

(b) The final angular velocity of each disk.

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A 80 mm Fig. P16.41 B 60 mm