In this article, I will introduce the reader to the Physics system used in the Unity game engine. First, I will introduce the Physic Material Asset that is used to define physics properties for collider surfaces. I will also introduce Colliders and talk about the different kinds of Collider types you can create. The Rigidbody component is absolutely essential for performing physics simulations on GameObjects. I will show you how you can create a Rigidbody GameObject that can be user controlled. I will also talk about the Character Controller component that is provided by Unity to control upright characters. And finally, I will introduce the different Joints that are available in Unity.