Prob. $9.$ During machining C$-25$ steel with $0-10-6-7-8-90-1mm$ ORS shaped carbide cutting tool, the following observation have been made: Feed $=0\mathrm{.}18m\frac{m}{r}ev,$ depth of cut $=2mm,$ cutting speed $=150\frac{m}{m}in,P_z=160kgf,P_x=80kgf,$ chip thickness $=0\mathrm{.}4mm.$

Determine: a$)$ Chip reduction co$-$efficient, b$)$ Shear force and normal force at shear plane, c$)$ Kinetic co$-$efficient of friction. d$)$ Specific energy of friction.

$(2\mathrm{.}22,109\mathrm{.}55kgf,141\mathrm{.}41kgf,0\mathrm{.}74,133\mathrm{.}21kg\frac{f}{m}{m}^2)$