Centripetal force is the real inward pull that keeps objects moving in circles, while centrifugal force is the apparent outward push we only feel in rotation.

You're sitting in physics class, working on a traditional problem involving forces and acceleration, when you start to wonder where these terms even came from. Were they just dreamed up to bring ...

When you shine a flashlight into a glass of water, the beam bends. That simple observation, familiar since ancient times, ...

A basic pendulum is a mass at the end of a string that swings back and forth. It seems simple, and it appears in most introductory physics textbooks. But it's not a trivial problem to solve for the ...