The cutting force and thrust force have been measured in an orthogonal cutting operation: Fc =300 lb and Ft = 291 lb. The rake angle = 10ï°, the width of the cut = 0.200 in, the chip thickness before the cut = 0.015, and the chip thickness ratio = 0.4. Determine (a) the shear strength of the work material and (b) the coefficient of friction in the operation.