The mass moment of inertia represents a body's resistance to angular accelerations about an axis, just as mass represents a body's resistance to linear accelerations. This is represented in an equation with the rotational version of Newton's Second Law.F=ma(17.6.1)M=Iα(17.6.2)Just as with area moments of inertia, the mass moment of inertia can be calculated via moment integrals or via the method of composite parts and the parallel axis theorem. This page will only discuss the integration method, as the method of composite parts is discussed on a separate page.