Rigid Body Physics Examples
https://andreasplesch.github.io/Library/Examples/html5/physics/generalPhysics.html
https://andreasplesch.github.io/Library/Examples/html5/physics/ballJoint_pendulum.html
https://andreasplesch.github.io/Library/Examples/html5/physics/inlineScenePhysics.html
https://andreasplesch.github.io/Library/Examples/html5/physics/motorJoint.html
https://andreasplesch.github.io/Library/Examples/html5/physics/singleAxisHingeJoint.html
see https://github.com/andreasplesch/Library/tree/gh-pages/Examples/html5/physics