The reason we know lightning precedes thunder (besides watching the occasional movie) is that sound moves slower than light. That delay give us an idea … Read More

Electricity is an invisible thing; yet you might not realize just how much force is present between tiny charges. Those seemingly annoying static shocks is … Read More

Suppose two teams pull on an identical rope in opposite directions equally hard. Nothing happen. The rope doesn’t budge. It feels as if no forces … Read More

By the time you get that string pulled back right, the arrow’s going. But the felt quickness isn’t a sign of everything that occurs when … Read More

In fact you don’t notice the pull of gravity acting on you, but if a sneeze hits your face, you do. It happen quickly, and … Read More

From a soccer player’s chip shot to artillery fire, projectile motion trace out a certain curve. That curve depends on launch angle and initial speed … Read More

There are moments when you want to figure out how far something is or how long it takes. Perhaps you’re waiting on a train platform, … Read More

The concept of kinetic energy becomes intuitive as soon as you encounter it. Intuitively, we know a fast ping pong ball might just sting, while … Read More

A normal force calculator is a computational physics tool that calculates the normal force on a body in contact with a surface. In simple terms, … Read More

Centripetal acceleration calculator is a great tool for calculating the centripetal acceleration of an object moving in a circular path. These calculators operate on advanced … Read More