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 ...

I'm going to go over two fundamental ideas in physics: the momentum principle and the work-energy principle. Let's use these two ideas for some simple physics cases and see what happens.

Work, power and efficiency calculations for your physics GCSE foundation and higher triple science exams with Bitesize interactive practice quizzes covering feedback and common errors.

Why so many “elementary” particles? Why four forces? How do dark matter, dark energy, gravity and space-time fit in? Answering these questions is the work of elementary particle physics.

A research team from Penn State has broken a 165-year-old law of thermal radiation with unprecedented strength, setting the stage for more efficient energy harvesting, heat transfer and infrared ...

This is the first film in our new series Faces of Physics, a collection of films that reveal the working lives of people in physics and its related careers. By telling the personal stories of the ...

But melting quarks will never work as an energy source or a weapons source, as the increased efficiency over traditional nuclear fusion at these high, unstable energies is far surpassed by the 100 ...