Foucault's Pendulum and Inertial Oscillation

Observing motion of a pendulum with movies

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Period of rotation:
17 sec


Period of rotation:
3.6 sec (N=2)


Period of rotation:
1.8 sec (N=1)
Inertial oscillation


Period of rotation:
1.8 sec (N=1)
Filmed from stationary system.

The period of inertial oscillation (N=1) is half the period of rotation.

Experimental conditions

The oscillation period of the pendulum was 1.8 sec.
N is the period of the rotation expressed as a multiple of the period of the pendulum.

Filming conditions

Real time recording.
240x180: 15 fps, 320x240: 30 fps.