The velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by (where $$\omega $$ = Angular velocity of the cam shaft)

A. $$\omega \left( {{{\text{r}}_1}{{\text{r}}_2}} \right)\sin \theta $$

B. $$\omega \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)\sin \theta \sec 2\theta $$

C. $$\omega \left( {{{\text{r}}_1}{{\text{r}}_2}} \right)\cos \theta $$

D. $$\omega \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)\cos \theta \,{\text{cosec2}}\theta $$

Answer: Option B