# Rigidbody

> The source/target is defined by the Rigidbody2D.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine](/engine/6000.6/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
Rigidbody = 0
```

### Remarks

When used, this equates to the center-of-mass.