The angular inertia of a rectangular prism. http://www.turboimagehost.com/p/1595403/untitled.JPG.html http://www.turboimagehost.com/p/1595403/untitled.JPG.html (how do i put an image) I don't know any math, besides algebra. I know some physics. http://en.wikipedia.org/wiki/List_of_moments_of_inertia - not there How do I calculate the angular moments of inertia for a rectangular prism that has it's axis on the side, 1/4 it's length off the side, 3/2 it's length off the side, etc. What to do if i don't know the mass of the material, but i know it's density. density / volume = mass ? if the axis of rotation is in the center, that dimension*mass is/ by 12 if the axis of rotation is on the edge, that dimension*mass is/ by 3 Is it a linear relationship?