Friction is an intrinsic physical phenomenon to curling. Without it, objects in motion would move endlessly, without slowing down. This would cause many safety-related problems: Cars or trains could ...

Get the essentials on static and kinetic friction forces! This video covers the key differences between these two types of friction, how to calculate them, and real-world examples to help you ...

All street-legal brake pads sold in the U.S. feature DOT-mandated friction codes and other data marked right on the parts. That's important info because the higher a brake pad's coefficient of ...

I don't normally watch many NASCAR races, but I do come across some NASCAR videos online. Sometimes these clips become the basis of a great physics problem. In this case, it's a 21-car crash at the ...