While turning a C15 steel of 160mm diameter at 215rpm, 2.5mm depth of cut and feed of 0.16mm/rev by a tool of geometry 0-10-8-9-15-75-0mm, the following of 0.16 observations were made. Tangential component of the cutting force = 500N, axial component of the cutting force = 200N, chip thickness = 0.48mm. Determine the dynamic shear strength of the work piece material.