# Rigidbody physics

> Apply physics-based behavior to GameObjects.

In physics simulation, [rigid bodies](https://docs.nvidia.com/gameworks/content/gameworkslibrary/physx/guide/Manual/RigidBodyOverview.html) enable physics-based behaviour such as movement, gravity, and collision.

In Unity, you can configure rigid bodies with the [`Rigidbody`](/engine/6000.3/script-reference/unityengine/rigidbody.md) class, or the corresponding [Rigidbody](/engine/6000.3/manual/physics-section/physics-overview/rigidbody/class-rigidbody.md) component.

| **Topic**                                                                                                                           | **Description**                                                                                        |
| ----------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------ |
| [Introduction to Rigidbody physics](/engine/6000.3/manual/physics-section/physics-overview/rigidbody/rigidbodies-overview.md)       | Overview of the concepts and fundamental behaviours of the Rigidbody class and component.              |
| [Configure Rigidbody colliders](/engine/6000.3/manual/physics-section/physics-overview/rigidbody/rigidbody-configure-colliders.md)  | How to configure Colliders on a Rigidbody so that the physics system can accurately detect collisions. |
| [Apply constant force to a Rigidbody](/engine/6000.3/manual/physics-section/physics-overview/rigidbody/rigidbody-constant-force.md) | How and when to apply a constant linear or rotational force to a Rigidbody GameObject.                 |
| [Apply interpolation to a Rigidbody](/engine/6000.3/manual/physics-section/physics-overview/rigidbody/rigidbody-interpolation.md)   | How to use interpolation to smoothen the movement of a Rigidbody if it appears jittery at runtime.     |
| [Rigidbody component reference](/engine/6000.3/manual/physics-section/physics-overview/rigidbody/class-rigidbody.md)                | Reference page for the Rigidbody component.                                                            |
| [Constant Force component reference](/engine/6000.3/manual/physics-section/physics-overview/rigidbody/class-constant-force.md)      | Reference page for the Constant Force component.                                                       |

## Additional resources

* [Nvidia: PhysX Rigid Body overview](https://docs.nvidia.com/gameworks/content/gameworkslibrary/physx/guide/Manual/RigidBodyOverview.html)