Interactive solution 9.37 presents a method for modeling this problem. multiple-concept example 10 offers useful background for problems like this one. a cylinder is rotating about an axis that passes through the center of each circular end piece. the cylinder has a radius of 0.130 m, an angular speed of 78.0 rad/s, and a moment of inertia of 1.25 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 6 during a time of 3.00 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.