How much fresh water is in the United States? It's a tough question, since most of the water is underground, accessible at varying depths. In previous decades, it's been answered indirectly from data ...

In this video, we explain the capstan equation and how friction affects a rope or string wrapped around a surface. You’ll learn where the equation comes from, what each term means, and how it’s ...

In this video, we solve a classic AP Physics 1 ramp to projectile motion problem step by step, showing how energy, kinematics, and motion concepts connect. Ideal for exam prep and for students looking ...

Flux physics refers to continuous change in physical quantities, including energy transfer and dynamic equilibria. Flux is ...