Sixteen bowling balls strung from a wooden frame swing back and forth in unison, then in an undulating curve, then into seeming chaos before lining up once again. Each bowling ball takes a slightly ...

The bowling ball pendulum is held up to the demonstrator's face and released. Because of conservation of energy, the ball will not swing higher than the height at which it was released (in fact, ...

Shiny metal balls swing hypnotically from museum ceilings worldwide, knocking over tiny objects arranged in a circle on the floor. These Foucault pendulums elegantly demonstrate that Earth is spinning ...

Learn how to make a simple DIY pendulum using a ping pong ball and basic household materials. This step-by-step guide shows ...

Spectators gathered in Paris in March 1851 were astonished to witness evidence of the Earth’s rotation. With a simple apparatus comprising a heavy ball swinging on a wire, Léon Foucault showed how the ...