# speed

> The speed to be maintained along the surface.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.5/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public float speed { get; set; }
```

### Remarks

This `speed` will be maintained by applying continually applying impulse forces to the target [Rigidbody2D](/engine/6000.5/script-reference/unityengine/rigidbody2d.md).