# ClothBodyComponent.ExternalForce An external force applied to a single particle, in Newtons. ``` struct ExternalForce ``` ## Topics ### Accessing the force vector [`var vector: SIMD3`](/documentation/RealityKit/ClothBodyComponent/ExternalForce/vector) The force vector applied to the particle, in Newtons. ### Initializers [`init()`](/documentation/RealityKit/ClothBodyComponent/ExternalForce/init()) Creates an external force with zero magnitude. [`init(SIMD3)`](/documentation/RealityKit/ClothBodyComponent/ExternalForce/init(_:)) Creates an external force with the given force vector. ## Relationships ### Conforms To [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Hashable`](/documentation/Swift/Hashable) [`Equatable`](/documentation/Swift/Equatable) [`Sendable`](/documentation/Swift/Sendable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)