Mechanical Engineering - Theory of machines - Discussion

Cam follower is a forced closed pair.

So, None of the options are correct.

Cam and follower is the correct answer. I agree.

Open pair is forced closed pair and all forced closed pair is example of higher pair and that for cam and follower is open pair.

Forced closed pair or open pair is same.

What is the difference between closed pairs and self-closed pairs?

Open pair is aka forced closed together and they are not held together. These all questions are from rajput and there have been a lots of mistake. So answer is D.

Yes, cam and follower is crt, 2 reasons one not held mechanically so not a surface contact there is only a point contact cam is correct for any way.

Yes, answer is d.

As per my knowledge, cam and follower may both type of pair i.e. open and closure pain.

Ref: S S Rattan's book.

When two links of a kinematic pair are not held together mechanically but remain in contact with each other under the action of the force of gravity or some spring action, then such a pair is called an open pair. EG. cam and follower as shown in the figure are in contact due to the force of gravity and the forces exerted by the spring.

Closed pair is the Answer.

When two links of a kinetic pair are held together mechanically, in such a manner that only the required type of relative motion occurs, they are called closed pair. All lower pairs and some higher pairs are closed pairs. Example: enclosed cam and follower makes a closed pair.