This repository contains selected physics reference notes focused on the fundamental behavior of real-world dynamic systems.
The material emphasizes physical causality – energy storage, dissipation, feedback, and time evolution – that underlies engineering models used in electrical, mechanical, and control systems.
Rather than presenting physics as a collection of isolated formulas, these notes aim to capture the physical structure that gives rise to common system behaviors such as exponential response, time constants, stability, and instability.
The content is intended as a long-term working reference for reasoning about system behavior across domains, including modeling, simulation, and embedded implementation.
This work reflects a synthesis effort developed to preserve understanding across representations, rather than to introduce new theory or alternative formulations.
Author: Percival Segui
Independent engineering technical reference