The 5-kg cylinder is initially at rest when it is placed in contact with the wall B an...

The 5-kg cylinder is initially at rest when it is placed in contact with the wall B and the rotor at A. If the rotor always maintain s a constant clockwise angular velocity ω = 6 rad/s, determine the intial angular acceleration of the cylinder. The coefficient of kinetic friction at the contacting surfaces B and C is μk = 0.2.