Version: 4.4.0

# Rigid Body 2D

The Rigid Body 2D component enables you to introduce realistic physics simulations and interactions to 2D objects in your scene. By adjusting the properties of the Rigid Body 2D component, you can control how objects move, respond to external forces, and interact with each other.

For 3D objects, check out the Rigid Body component.

## Add a Rigid Body 2D Component​

To add a Rigid Body 2D component:

1. Go to the Hierarchy panel
2. Add or select a 2D object and locate its components in the Inspector panel
4. Go to 2D Physics
5. Select Rigid Body 2D

## Properties​

PropertyDescription
MassDetermines the weight of an object and how it interacts with other objects in the physics simulation. Objects with higher mass will have more resistance to external forces and require more force to move or rotate.
Gravity ScaleThe gravity on the object
DampingControls the amount of resistance an object experiences when moving through air or other fluids. Higher damping values cause the object to slow down faster, mimicking increased air resistance or friction.
Angular DampingDetermines how quickly the object will come to a stop when no external forces are acting on it. Similar to Damping, Angular Damping applies specifically to the object's rotation. Adjusting Angular Damping controls the object's rotational behavior.
External ForceAllows you to apply a force to the object in a specific direction. This force can simulate effects like wind or other external factors that affect an object's movement. By adjusting the magnitude and direction of the force, you can create realistic physics-based movements.
External TorqueA force that causes the object to rotate around a specific axis. It is useful for simulating rotational forces, such as a motor turning a wheel or twisting motion. By applying External Torque, you can add dynamic rotational behavior to your objects.
VelocityControls the speed of the object in a given direction
Angular VelocityDetermines how quickly an object rotates around an axis of rotation and how fast the axis itself changes direction
Is StaticDetermines whether the object is affected by physical forces in the physics simulation. If enabled, the object becomes static and does not respond to external forces. This property is useful when you want to make an object move freely without constraints from the physics simulation.
ConstraintRestricts movement of the 2D object. The options are:
• X: Locks the x-axis movement of the object
• Y: Locks the y-axis movement of the object
• Rotation: Locks the rotation of the object