Objective To assess Multi-directional Impact Protection System (MIPS) helmet technology on rotational velocity during head impact using a novel testing method. Design Optimization study. Setting ...

Scientists have just plotted changes in Earth's axis through laboratory measurements. To do this, they constructed the world's most stable ring laser. Previously, scientists were only able to track ...

Really. If you are moving in a straight line, you could think of this as a non-constant angular velocity. Also, you can think of the moment of inertia of the person as changing since the person is ...

Understand rotational motion in a clear, intuitive way with a lesson designed to stick with you forever. This video breaks ...

If the length of a day changed by fractions of a millisecond, it probably wouldn’t make you late for work—that’s still on you. But the speed of Earth’s rotation does very subtly change over time, ...

If you’ve ever played with tops, you know that some spin easily while others wobble. Ever wonder why? The answer has to do with rotational inertia, a property shared by all rotating systems. Sometimes ...

This part of the summer is seen as perhaps the most difficult of a major league season. The dog days of July and August, with the most oppressive weather of the year, is when small bumps and bruises ...