Question - In orthogonal turning of a bar of 100 mm diameter with a feed of 0.25 mm/rev, depth of cut of 4 mm and
cutting velocity of 90 m/min, it is observed that the main (tangential) cutting force is perpendicular to the
friction force acting at the chip-tool interface. The main (tangential) cutting force is 1500 N. The normal force acting at the chip-tool interface in N is