🧰 Hooke's Law Spring Stiffness Fit Bench (2D)

2D spring bench: hang masses on a damped spring, record noisy ruler readings and fit k with an uncertainty, with optional friction, drag and parallax errors. RK4 solver, closed-form and 200-trial coverage checks.

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install