The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)

A. $${\omega ^2} \times {\text{OQ}}$$

B. $${\omega ^2} \times {\text{OQ}}\sin \theta $$

C. $${\omega ^2} \times {\text{OQ}}\cos \theta $$

D. $${\omega ^2} \times {\text{OQtan}}\theta $$

Answer: Option A