Irregular shapes to determine center of mass using plumb bob.

Center of Mass for various shapes. Various objects can be suspended : a handle has a thin metal rod that inserts in holes provided on the objects. A plumb bob on a string is hung from the suspension point, and a line is traced. Where all the lines from the different holes intersect is the center of mass.
UCB Index: 
PIRA Index: 
Demo Diagram: 
Demo Picture: