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A gravity train is a theoretical means of transportation for purposes of commuting between two points on the surface of a sphere, by following a straight tunnel connecting the two points through the interior of the sphere.
Mathematical considerations, Origin of the concept & Mathematical derivation
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gravity displaystyle earth time planet train surface center acceleration would density straight body path two sphere case frac half points
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Gravity train | is a | theoretical means of transportation for purposes of commuting between two points on the surface of a sphere | 0.90 | text |
| a planet | instance of | by following a straight tunnel connecting the two points through the interior of the sphere.In a large body | 0.80 | text |
| this train could be left to accelerate using just the force of gravity | instance of | by following a straight tunnel connecting the two points through the interior of the sphere.In a large body | 0.80 | text |
| since during the first half of the trip | instance of | by following a straight tunnel connecting the two points through the interior of the sphere.In a large body | 0.80 | text |
| in a spring or pendulum.In this case r t | instance of | and describes simple harmonic motion | 0.80 | text |
| Gravity train | related to In fiction | In | 0.60 | section |
| Gravity train | related to In fiction | Total Recall | 0.60 | section |
| Gravity train | related to In fiction | The Fall | 0.60 | section |
| Gravity train | related to In fiction | Earth | 0.60 | section |
| Gravity train | related to In fiction | Western Europe | 0.60 | section |
| Gravity train | related to In fiction | Australia | 0.60 | section |
| Gravity train | related to Mathematical considerations | Under | 0.60 | section |
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