Home▸Special Relativity▸Mass–Energy Equivalence E=mc² (2D)

⚡ Mass–Energy Equivalence E=mc² (2D)

Interactive 2D simulation of Einstein's E=mc². Adjust mass and velocity (as a fraction of light speed) to see rest energy, relativistic total energy E=γmc² and kinetic energy plotted live.

Special Relativity2DEasy60 FPS📱 Mobile-adapted⇄ 3D version

Details

CategorySpecial Relativity

RenderingCanvas 2D

DifficultyEasy

Target FPS60

ControlsMass slider (log scale, grams to tonnes), Mass presets: 1 g / 1 kg / Human / Car, Velocity slider (fraction of light speed, eased toward c), Velocity presets: Rest / 0.5c / 0.9c / 0.99c / 0.999c, Live HUD: rest energy, Lorentz factor, total energy, kinetic energy, relativistic mass, Interactive energy-vs-velocity graph with live marker

relativityenergymassphysicseinsteinlorentz-factor

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⚙ Under the hood

Interactive 2D companion to the E=mc² nuclear-physics sim, focused purely on relativistic mass-energy: drag a mass slider and a velocity slider (as a fraction of light speed) and watch rest energy, the Lorentz factor gamma, total relativistic energy E=γmc² and kinetic energy update live. A log-scaled energy-vs-velocity graph plots gamma against v/c and shows why the energy needed to move mass diverges toward infinity as v approaches c.

relativityenergymassphysicseinsteinlorentz-factor

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