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# ForceMode

The options that control how physics system applies the forces.

```
enum ForceMode
```

## Overview

`ForceMode` allows you to customize how the physics system applies the force-like vector quantity that you set via
[`setForce(_:index:)`](/documentation/RealityKit/ForceEffectParameters/setForce(_:index:))
and [`setTorque(_:index:)`](/documentation/RealityKit/ForceEffectParameters/setTorque(_:index:)).
For example, [`ForceMode.force`](/documentation/RealityKit/ForceMode/force) indicates the vector quantity has the unit of force, which is the most common choice.
You can use [`ForceMode.acceleration`](/documentation/RealityKit/ForceMode/acceleration) to exert a constant acceleration on rigid bodies regardless of their mass.

## Topics

### Enumeration Cases

[`case acceleration`](/documentation/RealityKit/ForceMode/acceleration)

A direct adjustment to a body’s linear or angular acceleration, independent of its mass or inertia.

[`case force`](/documentation/RealityKit/ForceMode/force)

A constant force or torque applied to a body, influencing motion over time.

[`case impulse`](/documentation/RealityKit/ForceMode/impulse)

A direct adjustment to a body’s linear or angular momentum.

[`case velocity`](/documentation/RealityKit/ForceMode/velocity)

A direct adjustment to a body’s linear or angular velocity, independent of its mass or inertia.

## Relationships

### Conforms To

[`Equatable`](/documentation/Swift/Equatable)

[`Hashable`](/documentation/Swift/Hashable)

[`Decodable`](/documentation/Swift/Decodable)

[`Encodable`](/documentation/Swift/Encodable)

---

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