How fast does something have to go to completely escape its planet's gravitational pull? I'll define escape as getting infinitely far away, but ju...

Newton derived the proportionality constant from Kepler's Third Law using his newly formed Law of Universal Gravitation. That's how I know you're ...

We find that applying a torque over some angle is equivalent to applying a force over some distance. They even have the same units!

What it do?

What's this script L bidness?

Why do things change their angular velocity? Soon, you'll know.

How greasy does the floor have to be before a ladder slips out from under a zombie? Well, it depends on where the zombie is, of course. Can zombi...

Statics is studied in great depth by mechanical engineers. We get a taste in this video.

This video introduces tension and some of the funky results that come out of multiple mass problems

Things that roll without slipping have some fraction of their energy as translational kinetic and the remainder as rotational kinetic. The ratio d...

How fast does the axle of a bike wheel move? How fast does the BOTTOM of a wheel move?

How to find it, what it means, and some examples

We consider why shooting mass out the back of a rocket changes its momentum.

We begin to understand what a derivative is and how it's useful in physics.

Collisions!

Biology is useful.