Assertion: curve's fall | /r/CapableOf | produce same effect
Facets:
value: as zero gravity for most purposes
type: PURPOSE
Source sentences:
text: Aircraft used to create a weightless state for purposes of experimentation, such as NASA's "Vomit Comet", follow a vertically parabolic trajectory for brief periods in order to trace the course of an object in free fall, which produces the same effect as zero gravity for most purposes.