3D Physics for object-oriented projects

This section describes the main components available through Unity’s built-in 3D physics engine, which you can use in object-oriented projects. It includes the following:

• An overview of the main physics-related concepts: Rigidbodies, Colliders, Joints, physics articulations and Character Controllers.
• Some explanations on specific physics contexts: Continuous collision detection and Multi-scene physics.
• A description of the Physics Debug Visualization.

In addition, the 3D Physics Reference provides a detailed description of all available components and the Physics HOWTOs section contains a few tips about common physics-related tasks.