Uploaded July 2013 | Updated September 2026, 1 week ago
Two coupled pendulums begin in harmony—but as their motion grows more energetic, they enter a realm of chaos.
Initially governed by simple harmonic motion, the system becomes dramatically unpredictable when large displacements are introduced. The pendulums rotate clockwise and counterclockwise, change direction abruptly, and accelerate unexpectedly—just when you think you’ve grasped the pattern.
As noted by Harvard’s Natural Sciences Lecture Demonstrations:
“Deterministic systems are not necessarily predictable. Even simple setups like coupled pendulums can exhibit chaotic behavior when nonlinear forces dominate.”
This is “a simple physical system that exhibits rich dynamic behavior with strong sensitivity to initial conditions” (American Journal of Physics, 1993).
Near the end of the video, observe how the pendulums exchange momentum—a striking visual of energy transfer in a resonant, chaotic system.
View multiple demonstrations of nonlinear pendulum dynamics:
youtube.com/playlist?list=PLCbYhDNjOviGvNl8wLwDKJX_1h484-wFY
Source of design: Make Magazine at youtube.com/watch?v=d2E5oojoXjk
Music
Title: Hickory Hollow
Artist: Dan Lebowitz
Album: Hickory Hollow, Released 2020
#CoupledOscillators #beatmode #EnergyTransfer #doublependulum
Two coupled pendulums begin in harmony—but as their motion grows more energetic, they enter a realm of chaos.
Initially governed by simple harmonic motion, the system becomes dramatically unpredictable when large displacements are introduced. The pendulums rotate clockwise and counterclockwise, change direction abruptly, and accelerate unexpectedly—just when you think you’ve grasped the pattern.
As noted by Harvard’s Natural Sciences Lecture Demonstrations:
“Deterministic systems are not necessarily predictable. Even simple setups like coupled pendulums can exhibit chaotic behavior when nonlinear forces dominate.”
This is “a simple physical system that exhibits rich dynamic behavior with strong sensitivity to initial conditions” (American Journal of Physics, 1993).
Near the end of the video, observe how the pendulums exchange momentum—a striking visual of energy transfer in a resonant, chaotic system.
View multiple demonstrations of nonlinear pendulum dynamics:
youtube.com/playlist?list=PLCbYhDNjOviGvNl8wLwDKJX_1h484-wFY
Source of design: Make Magazine at youtube.com/watch?v=d2E5oojoXjk
Music
Title: Hickory Hollow
Artist: Dan Lebowitz
Album: Hickory Hollow, Released 2020
#CoupledOscillators #beatmode #EnergyTransfer #doublependulum
