Alexander V. Emelyanov Bauman Moscow State Technical University (Kaluga Branch), Bazhenov str, 2, Kaluga 248000, Russia pcwork1@mail.ru International Journal of Fundamental Physical Sciences (IJFPS) 5 2 43-53 June, 2015 2231-8186 https://doi.org/10.14331/ijfps.2015.330085 The basic concepts and laws of classical dynamics are analyzed with emphasis on the physical nature of inertial forces and their relationship with the ether. The study proposes that inertial forces, traditionally considered fictitious, are real forces generated by an immovable ether that also governs gravitational interactions. The work redefines Newton’s laws incorporating ether dynamics, offering a reformulation that includes a separate law for inertial forces. It challenges conventional relativistic views, arguing that Newtonian mechanics must be extended through refined laws rooted in ether-based models. Ether, Inertial reference frame, Principle of relativity https://creativecommons.org/licenses/by/4.0/