Chaos 
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Lab ActivitiesThe students investigate the dynamics of an inverted pendulum with a torsional restoring force. Because the equation of motion can be approximated by a nonlinear equation known as the Duffing equation, this sort of pendulum is known as a Duffing oscillator. Although the system is very simple (a flexible steel ruler with a little weight on topsort of like a metronome) the motion has regimes where the behavior is neither regular, nor predictable: knowing the position and velocity at some point in time is of no use in predicting the posiiton and velocity at some later time. Course LevelIntermediate: P49 Student Handouts
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