what is the axis of rotation of a particle or an extended body in a circular path?

Question

vincent-lyon.fr · Answer

What you mean is not very clear.
If a particle has a circular path, the centre of the circle acts as a sort of axis of rotation.
Maybe you can post a diagram?

afifarahman · Answer

@Vincent-Lyon.Fr

vincent-lyon.fr · Answer

The point-mass moves along the circle. The centre of its path is the centre of the circle.

afifarahman · Answer

why wouldn't we consider axis of rotation as the axis of the point mass? I mean why center of the circle?

afifarahman · Answer

Angular momentum of rigid body in a circular path  is $$L= I \omega $$ where $$I= mr ^{2}$$ what will be r? Radius of body or circle?

vincent-lyon.fr · Answer

A point-mass does not rotate, only a solid does.
What is the question you want to solve? It would be easier for us to help you if we knew what is needed in the end.