newton/docs/guide/particle.jade

A playful, particle-based physics engine designed from the ground up for JavaScript.

p.
  Newton has three building blocks: Particles, Forces, and Constraints.
  Particles are points in space that have X and Y coordinates as well as mass (size).

pre.CodeBlock.
  var particle = Newton.Particle(10, 20);  // x, y
  sim.add(particle);