Chaotic motion is nonrepetitive and cannot be reliably
predicted from a given set of
initial conditions. It occurs in weather and smoke plumes.
Dan Knechtel (2004) worked on a chaotic motion project
that involved nonlinear springs
attached to a motor. To measure the motion, Dan attached a computer to a
position transducer. He obtained graphs of velocity versus position that
were quite erratic, a characteristic of chaotic motion. Dan used a
Velleman interface to produce a graph of velocity versus position.