A scamless, tubing \( 40 \mathrm{~mm} \) outside diameter is turned orthogonally on a lathe. The following data available: rake angle \( 30^{\circ} \), cutting speed \( 18 \mathrm{~m} / \mathrm{min} \), fced 0.15 \( \mathrm{mm} / \mathrm{rev} \), length of continuous chip in one revolution is \( 50 \mathrm{~mm} \), cutting force \( 2000 \mathrm{~N} \), feed force \( 800 \mathrm{~N} \). Calculate the coefficient of friction, shear plane angle, velocity of chip along toll face and chip thickness.