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by AnimalMuppet
2124 days ago
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Even without relativity, the ejection velocity matters. To get the same change in momentum, you need to eject more mass if you have a lower ejection velocity. That means that you have to carry more mass to eject. And that means that, to accelerate that mass, you have to eject more mass. And so on. It just becomes really unworkable really quickly. (This is called the "rocket equation".) As for the rest of your second paragraph: Look into how relativistic velocity addition works. |
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