It's almost always the last topic in the first semester of introductory physics—angular momentum. Best for last, or something? I've used this concept to describe everything from fidget spinners to ...

How many times have you said, “I wish the days were longer”? Well, NASA scientists say the construction of China’s Three ...

Forbes contributors publish independent expert analyses and insights. The Universe is out there, waiting for you to discover it. You can take any particle in the Universe and isolate it from ...

Since energy is conserved (the gravitational force is conservative), we can use the work/energy equation to determine the speed of the satellite as a function of the distance R from O to P. Since the ...