'Springs' and 'Discretization of the problem'
http://www.youtube.com/watch?v=uP7uxiQKGuM (at 2:57 and 4:00)
Rocking Horse pivots and follows an elliptical path,
Same set-up but with a spring,
A foot colliding with the ground follows the same path.
Slinky |ˈsli ng kē|
noun ( Slinky) trademarka toy consisting of a flexible helical spring that can be made to somersault down steps.(In action: https://www.youtube.com/watch?v=ltwxC19s5u8)--Some extra's on Pivoting (sliding)Pivot.pdf (397 kb) - CollisionAntennae.pdf (647 kb)
