# velocity

> Incident velocity at the intersection point of the collision.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.ParticleSystemModule

```csharp
public Vector3 velocity { get; }
```

### Remarks

The velocity is reported in world coordinates regardless of whether the Particle System is simulated in local coordinates.