Chip velocity of cutting tool is given by

Question

If  V = cutting velocity,$\phi$ = shear angle, $\alpha$ = rake angle, chip velocity is

(a) $\frac{V \sin \phi }{\cos (\phi - \alpha )}$        (b) $\frac{\cos (\phi - \alpha )}{V \sin \phi }$

(c) $\frac{V \cos \phi }{\sin (\phi - \alpha )}$        (d) $\frac{\sin (\phi - \alpha )}{V \cos \phi }$