An annealed copper strip (same material as in V) 9 inches wide and 1.5 inch thick was reduced to the maximum extent possible in a single pass of flat rolling. During this reduction, the coefficient of friction was maintained at 0.25 and the center-center distance between the rolls was 15.5 inches. Calculate the length of contact between roll and strip. Calculate the true strain in the roll gap. Calculate the true stress at this value for the above material. Use an average of this stress and the true yield stress to determine the average true stress of the strip in the roll gap. Determine the roll force