Physics

Problem

Which of the following expressions represents the moment of inertia

I

of a continuous body of density

\rho

about a specified axis? a)

I = 2\displaystyle \int r^{2}\,dm

I = \displaystyle \int r^{2}\,dm

I = \displaystyle \int r^{2}\sigma\,dA

I = \displaystyle \int r^{2}\,dm\; -\; M d^{2}