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 ...

Many extreme roller coaster these days have vertical loops. Have you noticed that these loops are never circular? Why is this? They all, also, seem to have the same similar ‘inverted teardrop’ ...

An object traveling in a circle, even at constant speed, is accelerating. That's because its direction is constantly changing to point to the center of the circular path — a condition that's defined ...

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Learn how to calculate the spin rate required for a spacecraft to generate artificial gravity at half of Earth’s gravity! In this video, we break down the physics behind rotational motion, centripetal ...

TIM PEAKE:Hi I'm Tim Peake. I'm an astronaut based here at the European Space Agency, in Germany. And from December 2015 to June 2016, I spent six months orbiting Earth on the International Space ...