How Fast Is Foucault Pendulum?

A Foucault pendulum swings at the centre of its arc at about 1 km/h. Famous because it slowly rotates its plane of swing throughout the day, demonstrating Earth's rotation without any reference to the sky above.

A Foucault pendulum proves Earth's rotation without any reference to the sky.

• Similar pace to baby crawling
• Slowly rotates its plane to prove Earth's rotation