"Rigidbody component API"

• You need a pushable crate / physics prop and don't know which members the Rigidbody component actually exposes.
• ApplyForce does nothing — wrong force scale or missing collider setup.
• A prop flies off or barely budges when the player walks into it.

The Rigidbody component's public surface isn't fully enumerated in the wiki. Some members (like MassOverride) are set-only, others (like PhysicsBody) are nullable, and force units are engine-inches-based — all easy to get wrong without a verified reference.

Verified Rigidbody members:

// Core properties
rb.Gravity          // bool — enable/disable gravity
rb.MassOverride     // float (kg) — SET-ONLY override
rb.Mass             // float (kg) — READ
rb.Velocity         // Vector3 — read/write
rb.MotionEnabled    // bool

// Physics body (nullable)
rb.PhysicsBody      // PhysicsBody? → .MassCenter, .AutoSleep

Force API:

rb.ApplyForce(force);               // whole-step force
rb.ApplyForceAt(position, force);   // force at world point
rb.ApplyImpulseAt(position, impulse);

Dynamic prop recipe:

A pushable physics prop = ModelRenderer + non-static BoxCollider + Rigidbody:

var go = new GameObject();
var renderer = go.Components.Create<ModelRenderer>();
renderer.Model = Model.Load("models/dev/box.vmdl");

var col = go.Components.Create<BoxCollider>();
col.Static = false;  // MUST be non-static

var rb = go.Components.Create<Rigidbody>();
rb.Gravity = true;
rb.MassOverride = 10f; // kg

Push-on-contact spring (drag toward hold point):

var offset = holdPoint - body.MassCenter;
var force = offset * springK * body.Mass;
// Cap magnitude so heavy props resist a single puller
force = force.ClampLength(maxForce);
body.ApplyForce(force);

Force units are engine-based (kg·units/s²). To convert from SI Newtons, multiply by the meters-to-units constant (39.37). Light props (MassOverride small) fly; heavy ones barely move — that's F = ma working correctly.

The Rigidbody wraps a PhysicsBody managed by the engine's physics simulation. Setting Static = false on the collider is what makes the body dynamic (the default is static/kinematic). MassOverride as a set-only property means you can't read back what you set — use .Mass for reads. Force applied per-step accumulates naturally with the fixed-tick simulation.