Roblox physics Choose deliberately between simulation, character control, hit detection, and visual-only motion; they are different jobs. Targets Roblox's rolling platform APIs. Pair with for engine-neutral stability and feel. When to use - Use for BasePart assemblies, constraints, collision/query policy, ray/overlap queries, forces, impulses, moving physical objects, network ownership, or physics cleanup. - Use when is unreliable/security-sensitive, parts tunnel or jitter, a mechanism breaks when anchored, or old BodyMover patterns appear. When not to use: ordinary Humanoid lifecycle/control…