Introducing the NKTg Law: A Novel Framework for Varying Inertia in Motion Dynamics

Hi everyone,

I’d like to share a new concept I’m developing called the NKTg Law — a compact yet powerful framework for analyzing motion dynamics when mass varies over time.


Core Idea

NKTg Law defines how an object’s movement tendency depends on three fundamental variables:

  • x: position
  • v: velocity
  • m: mass (possibly varying)

Key Quantities

  1. NKTg₁ = x × p
  2. NKTg₂ = (dm/dt) × p

where

p = m × v // momentum
dm/dt = rate of change of mass

Interpretation Guide

  • NKTg₁ > 0 → tendency away from equilibrium
  • NKTg₁ < 0 → tendency toward equilibrium
  • NKTg₂ > 0 → mass variation supports motion
  • NKTg₂ < 0 → mass variation resists motion

Motivation & Applications

This model helps explain dynamic behavior in systems where mass changes over time—such as rockets burning fuel, objects accreting or shedding mass, or even biological systems. By analyzing NKTg₁ and NKTg₂, we can gain insight into stability and control of such systems.


Ask to the Community

  • Would anyone be interested in collaborating on a Scala simulation?
  • I’m thinking of building a small library (or using Akka actors / ScalaSTM) to simulate trajectories and plot NKTg₁, NKTg₂ vs. time.
  • Suggestions on Scala modeling tools (e.g., Breeze for numerics, ScalaFX for plotting, or integration with JFreeChart / Plotly via Scala wrappers) would be highly welcome.
2 Likes

Hi.
This sounds like a fun project - it is the kind of thing that does interest me…

My curiosity budget is already stretched thin, but I’d be happy to listen / read what you’re thinking, perhaps on discord? Same handle…
Simon

1 Like

I’m very glad to have the chance to collaborate with you! For now, let’s keep our discussion open here on this forum.