The Work Energy Principle is one of the big ideas in introductory physics courses. It’s so big that the textbook presentation can get a little confusing – but it doesn’t have to be that way.

A research team from Penn State has broken a 165-year-old law of thermal radiation with unprecedented strength, setting the ...

For this case, the work-energy equation becomes: And putting expressions in for the work done by the spring: Algebraically, I can add the 1/2ks 2 to both sides of the expression and I get: ...

On earth, the potential advantages of energy by controlled nuclear fusion are manifold: Limitless energy production, available all over the ... The difference or "missing mass" is converted into ...