eli5: why can’t we create artificial gravity on space crafts by accelerating at 9.8 m/s
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We can and we should, but not with acceleration. Constant acceleration would take lots of fuel. Instead we could use centripetal force in a large space station, such as the one used in the movie 2001: A Space Odyssey (note: many other movies use this too). The only energy required is to keep the station in a spin.
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