During orthogonal turning a steel rod at feed 0.25 mm per revolution and depth of cut 4.00mm by a tool of geometry 00, -100, 80, 70, 150, 600, 0 (mm); the following observation were made: Tangential force = 1,600N, axial force in fed direction = 800 N, Chip thickness = 0.60mm. find the coefficient of friction between chip tool interface and shear strength of work material from shear force