A Comment on “Transient Analysis of Energy Equation of Dynamic Systems”

In a previously published paper, Vibet presented a very useful equation that involves the product of the impulse function and the unit step function. In this short paper, a new and very simple proof of this equation with clear interpretation is given. In addition, a proof of the corresponding generalized equation is also provided. Students commonly report that the method proposed in this paper improves their understanding of the theorem and helps them achieve a better insight of the problem.