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- Gravity_train abstract "A gravity train is a theoretical means of transportation intended to go between two points on the surface of a sphere, following a straight tunnel that goes directly from one point to the other through the interior of the sphere.In a large body such as a planet, this train could be left to accelerate using just the force of gravity, since, during the first half of the trip (from the point of departure until the middle), the downwards pull towards the center of gravity would pull it towards the destination. During the second half of the trip, the acceleration would be in the opposite direction relative to the trajectory, but (ignoring the effects of friction) the speed acquired before would be enough to cancel this deceleration exactly (so that the train would reach its destination with speed equal to zero).".
- Gravity_train thumbnail Gravity_elevator.gif?width=300.
- Gravity_train wikiPageExternalLink the-science-of-total-recall.
- Gravity_train wikiPageExternalLink gravity_train-rom.html.
- Gravity_train wikiPageExternalLink A2960633.
- Gravity_train wikiPageExternalLink ?p=696.
- Gravity_train wikiPageExternalLink tunnel07.html.
- Gravity_train wikiPageExternalLink the_alameda-weehawken_burrito_tunnel.htm.
- Gravity_train wikiPageExternalLink gravsol.pdf.
- Gravity_train wikiPageExternalLink train.html.
- Gravity_train wikiPageExternalLink projekt-pociag-gravity.
- Gravity_train wikiPageExternalLink 0,9171,842469,00.html.
- Gravity_train wikiPageID "2199445".
- Gravity_train wikiPageRevisionID "592406735".
- Gravity_train hasPhotoCollection Gravity_train.
- Gravity_train subject Category:Futurology.
- Gravity_train subject Category:Mechanics.
- Gravity_train subject Category:Megastructures.
- Gravity_train comment "A gravity train is a theoretical means of transportation intended to go between two points on the surface of a sphere, following a straight tunnel that goes directly from one point to the other through the interior of the sphere.In a large body such as a planet, this train could be left to accelerate using just the force of gravity, since, during the first half of the trip (from the point of departure until the middle), the downwards pull towards the center of gravity would pull it towards the destination. ".
- Gravity_train label "Gravity train".
- Gravity_train label "Train gravitationnel".
- Gravity_train label "Tren gravitacional".
- Gravity_train label "Treno gravitazionale".
- Gravity_train label "Гравитационный поезд".
- Gravity_train label "قطار الجاذبية".
- Gravity_train label "重力火車".
- Gravity_train sameAs Tren_gravitacional.
- Gravity_train sameAs Train_gravitationnel.
- Gravity_train sameAs Treno_gravitazionale.
- Gravity_train sameAs m.06vc0t.
- Gravity_train sameAs Q966914.
- Gravity_train sameAs Q966914.
- Gravity_train wasDerivedFrom Gravity_train?oldid=592406735.
- Gravity_train depiction Gravity_elevator.gif.
- Gravity_train isPrimaryTopicOf Gravity_train.
