In an introductory physics course, there are three big ideas. There is the work-energy principle, the momentum principle and then the angular momentum principle. I'll skip the work-energy principle ...

Why is there no torque on the merry go round? There is no torque because you just stepped off. If you had jumped off, it could make a difference - unless you jumped off in a radial direction (this ...

Introduction You might have seen figure skaters spinning around quickly and then tucking their arms to spin faster—or opening them to spin more slowly. This happens, thanks to a physics concept known ...