In an orthogonal cutting operation, the cutting velocity is 30 m/min and the chip velocity 15 m/min. If the rake angle of the tool is 100.
i) the shear angle is
(a) 28.33 (b) 30.34
(c) 45 (d) can not be calculated
ii) Shear velocity with the help of a velocity triangle
(a) 7.5 m/min (b) 12m/min
(c) 25 m/min (d) 31 m/mim