<i>The NKT Law on Position and Varying Inertia Interaction</i>

The NKT Law on Position and Varying Inertia Interaction establishes a foundational relationship between spatial displacement (x), momentum (p), and the time-derivative of inertial mass (dm/dt). It extends classical dynamics by introducing two invariant products: xp and (dm/dt)·p, which govern the tendency and transformation of motion in variable-mass systems. The law has been validated using datasets from harmonic oscillators, rocket acceleration phases, and real planetary motion recorded by space agencies. This contribution provides an intuitive yet mathematically robust framework for analyzing motion beyond Newtonian assumptions.