---
title: physicsWorld
framework: spritekit
role: symbol
role_heading: Instance Property
path: spritekit/skscene/physicsworld
---

# physicsWorld

The physics simulation associated with the scene.

## Declaration

```swift
var physicsWorld: SKPhysicsWorld { get }
```

## Discussion

Discussion Every scene automatically creates a physics world object to simulate physics on nodes in the scene. You use this property to access the scene’s global physics properties, such as gravity. To add physics to a particular node, see physicsBody.