16650. 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) September 13, 2025 by Admin ω2 x OQ ω2 x OQ sin θ ω2 x OQ cos θ ω2 x OQ tan θ ✅ The correct answer is option A.