A geared industrial roll shown in the figure

A geared industrial roll shown in the figure is driven at 300 rev/min by a force F acting on a 3-in-diameter pitch circle as shown. The roll exerts a normal force of 30 lbf/in of roll length on the material being pulled through. The material passes under the roll. The coefficient of friction is 0.40. Develop the moment and shear diagrams for the shaft modeling the roll force as
(a) a concentrated force at the center of the roll, and
(b) a uniformly distributed force along the roll. These diagrams will appear on two orthogonal planes

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