Question

The linear velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by

(a) ω(r1-r2)sinθ

(b) ω(r1-r2)cosθ

(c) ωr1+r2)sinθsec^2θ

(d) ω(r1+r2)cosθcosec^2θ

I have been asked this question by my school principal while I was bunking the class.

This question is from Cams in chapter Cams of Machine Dynamics

Answer 1

The correct option is (c) ωr1+r2)sinθsec^2θ

To elaborate: Velocity = ωr1+r2)sinθsec^2θ

where ω = Angular velocity of the cam shaft,

r1 = Minimum radius of the cam,

r2 = Radius of the roller, and

θ = Angle turned by the cam from the beginning of the displacement for contact of roller with the straight flanks.