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A cylinder is rotating about an axis that passes through the center of each circular end...

A cylinder is rotating about an axis that passes through the center of each circular end piece. The cylinder has a radius of 0.120 m, an angular speed of 62.0 rad/s, and a moment of inertia of 1.46 kg·m2. A brake shoe presses against the surface of the cylinder and applies a tangential frictional force to it. The frictional force reduces the angular speed of the cylinder by a factor of 3 during a time of 6.00 s. (a) Find the magnitude of the angular deceleration of the cylinder. (b) Find the magnitude of the force of friction applied by the brake shoe.

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