Lissajous pendulum graphing swing
A lissajous pendulum in the form of a swing, allows graphing the motion with a pen
http://woodgears.ca/physics/lissajous...
A lot of people have pointed out that this video did not show up in their subscription feeds, and, indeed, initial views are lower than usual. So youtube either has a bug or is screwing around with their algorithms. Maybe hit that "bell" icon to add it to your notifications.
