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"the [science fiction] writer should be able to convince the reader (and himself) that the wonders he is describing really can come true...and that gets tricky when you take a good, hard look at the world around you."
- Frederik Pohl

Free Fall  
  Phrase describing how bodies move in orbit.  

First use of this phrase.

Since they were to use the space control, though, they would be subject to infinite acceleration, it would be a free fall, and Fuller would remain helplessly weightless.
From Islands of Space, by John W. Campbell.
Published by Amazing Stories in 1931
Additional resources -

See also zero g from Islands in the Sky (1952) by Arthur C. Clarke.

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Additional resources:
  More Ideas and Technology from Islands of Space
  More Ideas and Technology by John W. Campbell
  Tech news articles related to Islands of Space
  Tech news articles related to works by John W. Campbell

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