A swing, a mass on a spring, a vibrating string, an electrical circuit with a coil and a capacitor – all are oscillators. If there's no friction or resistance to slow the system, oscillations persist. With a little damping, activity rings down slowly. When there's a lot of energy dissipation, the system stops quickly. Harmonic Motion!

(LOOPY is an ultralight tool for thinking in systems ©2021 MITRE Corporation; cf LOOPY - Learn, Work, Save (2021-06-19), LOOPY - Throw a Ball (2021-08-17), LOOPY - Revolution vs Stability (2021-08-19), LOOPY - Decay Rates (2021-08-21), LOOPY - Foxes, Rabbits, and Grass (2021-08-23), ...) - ^z - 2021-08-26