12005. The displacement of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by (where R = Radius of flank, r1 = Minimum radius of the cam, and θ = Angle turned through by the cam) September 13, 2025 by Admin R(1 – cos θ) (R – r1)(1 – cos θ) R(1 – sin θ) (R – r1)(1 – sin θ) ✅ The correct answer is option B.