---
url: /api/kiln/physics/variables/StepPhysics.md
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[Kiln API](../../../index.md) / [kiln/physics](../index.md) / StepPhysics

# Variable: StepPhysics

```ts
const StepPhysics: System;
```

Steps Rapier by the fixed step and emits CollisionStarted / CollisionEnded.