Newtonâ??s second law as written appears simple, but how to use the law perceptually is a complex task. Most of the cases it is good for conceptual discussion or development. Normally the sign convention is not shown and has problems to solve. Due to this fact, many do not fully understand Newtonâ??s second law. Modeling complex behavior is like the Newtonian law; people tend to misuse. In this article, it is experienced modeling the complex behavior simply with embedded system engineering scheme, which is conceptually a new approach. In cases where applied Newtonâ??s second law for the center of gravity G but the correct point in the formulation is the center of mass C. This is why the subscript c, not G is chosen. Nevertheless, in many engineering applications, the gravity field may be considered uniform, hence the center of mass and the center of gravity coincide, C = G, even though they are different by definition.