Hello all, I am trying to work with the moment of inertia formula to integrate around some different geometrical shapes I'm working with. I looked up the general formula which I found to be [tex]I = mr^2[/tex]. I know that I can figure out the moments of inertia for any shape I need by taking that point mass and integrating it in various ways to get the moment of inertia for whatever i want but I'm stuck with this formula because I'm not sure what to input the the mass variable. All of the shapes I'm working with have a uniform density (except for some having holes cut in them), but I'm not sure how to represent the particular material in the point mass equation. I can find the total mass of the object I'm working with because I know the density of the material, but how do I apply that information to the point mass formula?