This article is about a fundamental law of Nature (Thermodynamics) which goes by the name of "Law of Motive Force. This author discovered and documented this law recently in a treatise entitled "The Nature of Motive Force" published by Springer- Verlag in 2014. The terminology "motive force" has been coined in every branch of exact as well as non-exact science. But until recently its true nature has not been revealed. From mechanistic view point, the motive force can be paraphrased as the tendency of a system or the motion that has a changed form. The law of motive force is enunciated as: "Every motive force is self-contradictory in its existence." The law of motive force is a powerful physical principle in solving every problem: simple or complex. One the other hand constructal law is well established in literature. An asymptotic approach, for example, method of intersecting asymptotes is adopted here to substantiate a connection between the law of motive force and the constructal law.

Keywords: Constructal law, Intersecting asymptotes, Law of motive force