# normalVelocity

> Relative normal velocity pre-solve. Used for hit events. If the normal impulse is zero then there was no hit. Negative means shapes are approaching.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.LowLevelPhysics2D](/engine/6000.3/script-reference/unityengine/lowlevelphysics2d.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public float normalVelocity { get; }
```