Painless Physics Primer

First, we have to cover some groundwork before we can get to the game development. There's a few concepts that require a bit of explanation. We promise that it will be quick and we'll try to keep the material from getting too dry.

Knowing this information is critical to preventing unnecessary confusion and frustration.

When you are in the midst of this tutorial, you will be glad that you read through all of this info! 
Painless Physics Primer
Four Types of Physics Nodes
The Humble Static Body
Comparing Rigid & Kinematic Bodies
Influencing the Scene with Physics Areas
The Classic Pong Example
Working with Collision Shapes