🪨 Drop Boulder Simulator (2D)

Side-view Canvas2D companion to the 3D crane-drop lab: release a boulder from an adjustable height and watch real gravity, mass and a surface-dependent restitution/friction model (packed soil, loose gravel, or granite) carry it through impact, bounces and settling dust, with live height, velocity and kinetic-energy readouts.

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