Question

The displacement of a flat faced follower when it has contact with the flank of a circular arc cam, is given by

(a) R(1-cosθ)

(b) R(1-sinθ)

(c) (R-r1)(1-cosθ)

(d) (R-r1)(1-sinθ)

The question was asked during an internship interview.

This is a very interesting question from Cams topic in section Cams of Machine Dynamics

Answer 1

Correct answer is (c) (R-r1)(1-cosθ)

Explanation: Displacement = (R-r1)(1-cosθ)

where R = Radius of the flank,

r1 = Minimum radius of the cam, and

θ = Angle turned by the cam for contact with the circular flank.