How do sci-fi movies simulate artificial gravity in space?
They don’t have to simulate artificial gravity, they just use the earth’s natural gravity and use the term artificial gravity to explain why their actor’s don’t float off. When they have to simulate a failure or absence of artificial gravity they hook their actors/stunt doubles to wires. If you’re asking how do sci-fi movie writers show how the space ships generate artificial gravity, well on Babylon 5, the human space station is shown spinning on its axis so that the laws of conservation of angular momentum simulate the gravitational force. The more “advanced” species like the Mimbari use gravitational plating in their ships (no explanation is offered as to how those plates work). In Star-trek and similar spin-offs there are gravitational field generators which when switched off cause chaos, (when a ship is badly damaged you see the actors floating as they would in a low gravitational environment). Just remember these are literary devises used by the script writers and story board art