Pendulum Pr0n


Fifteen uncoupled simple pendulums of monotonically increasing lengths dance together to produce visual traveling waves, standing waves, beating, and (seemingly) random motion.

The period of one complete cycle of the dance is 60 seconds. The length of the longest pendulum has been adjusted so that it executes 51 oscillations in this 60 second period. The length of each successive shorter pendulum is carefully adjusted so that it executes one additional oscillation in this period. Thus, the 15th pendulum (shortest) undergoes 65 oscillations.

[Thanks, Andy]

14 thoughts on “Pendulum Pr0n

  1. Anonymous says:

    This one is very similar:

  2. Anonymous says:

    Completely mesmerized by this, I spent a good part of yesterday building a version of this in Processing.

    Video is here:
    And source code is here:

  3. Swati Singhal says:

    beautiful physics…..:-):-):-)….

  4. Sreeks Kotra says:

    what’s happening & how??????

  5. Vishal Shinde says:

    It is great vedio

  6. Vishal Shinde says:

    It is great vedio

  7. Abhishek John says:


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My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal

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