Museo Galileo
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Circular pendulum and cycloidal pendulum
    • Setting:
      Interactive Rooms
    • Maker:
      Centro di Studi e Restauro per la valorizzazione di orologi antichi e strumentaria storico-scientifica - ITIS Leonardo da Vinci, Florence
    • Date:
      2011
    • Circular pendulum and cycloidal pendulum

This model illustrates the difference between the oscillations of the circular pendulum and the cycloidal pendulum.

The pendulum is a physical system composed of a cord and a weight, whose oscillations take place in equal intervals of time (isochronism).

The oscillations of a circular pendulum (which describes arcs of a circumference) are however isochronous only when they are rather short. The oscillations of a cycloidal pendulum (which describes arcs of a cycloid) are isochronous regardless of their amplitude.