Rigid Bodies

The Rigid Body component makes an entity simulate. Its most important setting is the body type:

Body type	Moves?	Use for
Static	Never	Floors, walls, level geometry.
Kinematic	Only when you move it	Platforms, doors, scripted movers.
Dynamic	Yes, fully simulated	Crates, props, anything that falls and bounces.

A dynamic body needs a collider with volume to get its mass. Static and kinematic bodies are not pushed by collisions, but dynamic bodies still collide with them.

Key properties

Property	What it does
Body Type	Static, Kinematic, or Dynamic (above).
Mass / Override Mass	Mass in kg. By default mass is computed from the collider’s volume and density; turn on Override Mass to set it directly.
Use Gravity	Turn off for projectiles or floating objects.
Linear / Angular Damping	Drag that bleeds off movement and spin over time.
Restitution Override	Bounciness, 0 (no bounce) to 1 (perfectly elastic).
Friction Override	Surface grip.
Center Of Mass Offset	Shift the balance point; lower it for car-like stability.
Allow Sleeping	Let a body that comes to rest stop simulating, which saves cost.
Motion Quality	0 = Discrete (cheap); 1 = LinearCast, which stops fast bodies tunneling through thin walls.
Max Linear / Angular Velocity	Speed caps.

Note

The Restitution and Friction Override fields are a fallback. If a collider has a Physics Material, that wins.

Moving bodies from a script

Apply forces and impulses, or read velocities, through World.Physics, see Scripting › Physics. Apply forces in OnFixedUpdate so they land on the physics step.