1.1 Double Pendulum:
a quick taste of chaos
•In mechanics, Newton's Laws allow precise analytical solutions to two problems:
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•          The simple pendulum
•          The Sun-Earth (two body system)
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•One small increase in complexity gives the following, with chaos and no such solution:
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•          The double pendulum
•          The Sun-Earth-Moon (three body system)
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• Click  for double pendulum simulation                      @
•d-pend