A couple of commenters expressed concern over the use of centrifugal force after my rant on the use of the word force. So, what is the deal with these two terms? Are they ok to use? Are they real ...

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 ...

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 ...