Which kinematic pair has point contact between the links?

Which kinematic pair has point contact between the links?

Options:

a. higher pair
b. lower player
c. revolute pair
d. none of the above

Correct Answer: a. higher pair

Explanation:

A kinematic pair is a joint between two rigid links which have relative motion between them. Kinematic pairs are divided into two main types according to the type of contact between them. If the two elements in a pair are in point contact or in line contact then the pair is called as higher pair, e. g. ball bearing, cam and follower. If the two elements in a pair are in surface contact then the pair is called as lower pair, e. g. nut and screw, universal joint. The lower pairs are again sub-categorized in two types, they are revolute pairs and prismatic pairs.