Space stations and artificial gravity

Astronauts and jet pilots are trained in centrifuges where they are spun round at high speed to simulate gravity and to test the "g force" that they can withstand. Thinking about g forces you can use the rotation of a space station to create the sensation of gravity at the rim. The "floor" would be the outer edge of the space station and the rotation rate to give an acceleration equal to Earth's gravity will vary depending on the size of the station but can be worked out using the equation for centripetal acceleration: a = g = v²/r = 9.8 ms-²