---
title: externalForces
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/clothbodycomponent/externalforces
---

# externalForces

The external forces applied to the particles in the body (in Newtons).

## Declaration

```swift
var externalForces: PerClothVertexData<ClothBodyComponent.ExternalForce>
```

## Discussion

Discussion By default, the external forces are set to the zero vector.

## See Also

### Applying external forces

- [ClothBodyComponent.ExternalForce](realitykit/clothbodycomponent/externalforce.md)
- [inflationConstraint](realitykit/clothbodycomponent/inflationconstraint-swift.property.md)
- [ClothBodyComponent.InflationConstraint](realitykit/clothbodycomponent/inflationconstraint-swift.struct.md)