# tangentImpulse

> The friction impulse. During a pre-contact callback this may be modified to seed the solver's warm start for this step.

## Definition

* **Type:** Property
* **Namespace:** [Unity.U2D.Physics](/engine/6000.7/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
public float tangentImpulse { readonly get; set; }
```