Using the linear mass density, the mass element, Δm, has a mass of: Δm=λΔr The rod is made of many such mass elements, and the moment of...Using the linear mass density, the mass element, Δm, has a mass of: Δm=λΔr The rod is made of many such mass elements, and the moment of inertia of the rod is thus given by: I=∑iΔmr2i=∑iλΔrr2i If we take the limit in which the length of the mass element is infinitesimally small (Δr→dr) the sum can be written as an integral over the dimension of th…