Question

What is cam and follower mechanism higher pair or lower pair

Answer 1

Answer:

explains that lower pairs are connections between two objects where the contact is over an extended area, whereas a higher pair is connected at a line contact (or a point contact). The cam and the follower touch only at a point in your two-dimensional diagram, so they form a higher pair

Answer 2

Answer:

Higher pairs

For example, the contact between a cam and its follower is a higher pair called a cam joint. Similarly, the contact between the involute curves that form the meshing teeth of two gears are cam joints, as is a wheel rolling on a surface.