#2924: Pendulum Types
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[Four types of pendulums are shown in a single panel. Each has a bullet list below the depiction.]
[Label:]
Simple pendulum
[A basic pendulum consisting of a joint, rod, and weight swinging in a regular arc]
- Periodic
- Stable
- Useful for timekeeping
[Label:]
Double pendulum
[A pendulum consisting of 2 joints, 2 rods, and a weight swinging in a more loopy arc]
- Aperiodic
- Chaotic
- Moderately cursed
[Label:]
Inverted pendulum
[An upside-down basic pendulum with some apparatus underneath vibrating up and down]
- Finely balanced
- Unstable
- Becomes stable when vibrated
[Label:]
Nightmare pendulum
[An inverted double pendulum, with an additional uninverted pendulum swinging within a large weight adorned with archaic/mystical symbols]
- Forbidden
- Unphysical
- Summons Maxwell's Demon
(Sourced from explainxkcd.com)
Title text:The creepy fingers that grow from a vibrating cornstarch-water mix can be modeled as a chain of inverted vertical pendulums (DOI:10.1039/c4sm00265b) and are believed to be the fingers of Maxwell's Demon trying to push through into our universe.