"In an orthogonal turning of a mild steel bar on a lathe the following data were available:

Diameter of workpiece = 60 mm

Cutting speed = 100 m/min

Back rake angle = 140

Feed rate 0.25 mm/rev

Cutting force = 150 kg

Feed force = 50 kg

Chip thickness = 0.4 mm

Calculate shear angle, coefficient of friction, cutting power, chip flow velocity and shear force."