During Foucalt’s life it was already proven that the Earth rotated, thanks to experiments which showed that weights dropped from tall towers fell slightly to one side rather than straight down. This ...

SOME four years since, while arranging a Foucault's pendulum for use in the class-room, it occurred to me to endeavour to obtain a permanent record of the experiment, and as the results were very good ...

A physical pendulum undergoes simple harmonic motion when displaced by a small angle. The oscillations are no longer simple harmonic motion when it is released from a large angle. The pendulum's pivot ...