I am trying to do a motion study. I have a path, and I want to roll the circle on that path. The path consists of multiple lines. I have saved both path and circle as block and imported them in assembly. The problem is that I can define the relation of the circle with any one of the line segment only.

   Is there a way to convert this path to the single entity to define rolling relation with the circle?

Or is there any other way of doing it?