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