An experiment in circular motion using a conker on a string.

The introductory video of 'Shaggy' whirling his conker was created with a program that includes a simulation engine for Newtonian mechanics. We used this engine to animate the conker and its string - so the resulting motion is in a sense 'real'.

Shaggy's hand drives the string. Its motion was defined using trigonometric functions of time applied to the various joints that make up the Shaggy model. In the final 5 seconds the hand moves with exactly half the frequency of the motion which set the conker whirling initially. Its amplitude is however unchanged.