A common use of these objects is to knock over dominoes or to trace lines in the sand to demonstrate the rotation of the earth.
The Blackburn variety of these objects can be represented with the Lissajous curve, and their Q factors include a gamma factor in the denominator due to Archimedes's principle and air resistance. Though it breaks down at high amplitudes, the small angle approximation allows the period of these systems to be represented as 2 pi times the square root of L over the acceleration due to gravity. A common use of these objects is to knock over dominoes or to trace lines in the sand to demonstrate the rotation of the earth. For 10 points, name these systems which feature a suspended weight swinging freely from a fixed point, including a variety named for Leon Foucault.
The Blackburn variety of these objects can be represented with the Lissajous curve, and their Q factors include a gamma factor in the denominator due to Archimedes's principle and air resistance.
pendulums [Accept pendula. Prompt on simple harmonic oscillator before mention.]