🪀 Hanging Spring and Mass: Period, Spring-Mass Correction and Gravity Lab

Hang a brass mass on a coil spring beside a ruler and time the oscillation with a stopwatch. Shows that the period depends on m and k but not on gravity (Earth, Moon, Mars, Jupiter), the m + ms/3 spring-mass correction, damping regimes, and a T-squared against m fit that recovers k and the spring's own mass.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install