Have you ever thrown your spare change into a coin vortex like the one we used to have in the gift shop at ECHO? When you put a coin in this, the coin spins around and around until eventually it ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: dwphotos Getty Images Centripetal and centrifugal forces are two terms used to describe ...

When humanity first started studying motion, circles posed a peculiar puzzle. Why do planets sweep endlessly around the Sun without flying off into the void of space? Why does a stone swung on a ...

On a Ferris wheel, your body feels different at different points of the ride. You feel lighter at the top of the wheel, and then heavier at the bottom. Why? Because of the circular shape of a Ferris ...