What is vindiagraph?

A vindiagraph is a type of graphical representation used to depict the motion of a pendulum or similar oscillatory systems. It typically consists of a rotating drum or disk on which a pen traces the path of the pendulum's swing over time, creating a visual record of its motion. This tool can help in analyzing the characteristics of oscillatory motion, such as amplitude and frequency. Vindiagraphs are often used in educational settings to illustrate principles of physics related to motion and dynamics.