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All the treatments of the Alcubierre drive I've seen have not dealt with the acceleration and deceleration. The nearest I've seen is the paper The Alcubierre Warp Drive: On the Matter of Matter, but this is mainly interested in the interactions of matter with the drive and it doesn't deal with the mechanism of acceleration. You'd have to specify how the ...

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Because of the way that an Alcubierre drive alters space to get a ship to exceed $c$, unwarping that space (in order to stop/travel at sublight speeds) would undo the fancy compression/expansion of space that allows the ship to travel above $c$. In short, the act of destroying the "warp bubble" would bring the ship's velocity down below $c$. The ship would ...

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If a car hits a wall momentum would be lost in form of sound and heat.

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Why does speed have nothing to do with inertia? It depends on what you mean by "inertia". With one exception, physicists don't use this word much. That one exception is "moment of inertia". The problem with "inertia" is that sometimes it means "mass", other times, "momentum". Mass in classical mechanics doesn't change with speed. Momentum very much ...

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Can you explain why speed has nothing to do with inertia? It is not clear if you think it has something to do or not. In a very faint way they are related, because inertia is that fictitious force that once a body has been accelerated and has gained KE and velocity, keeps it going forever if nothing stops it. Momentum is the quantity of motion that a ...

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Momentum is $p = m v$, so it does have to do something with speed in the sense that it is proportional to it. However, you can have a different momentum with the same speed and vice versa. Take a bullet that has a mass of 3 g and a velocity of 370 m/s. Then the momentum would be about 1 kg m/s. You get the same momentum if you take a pack of flour (1 kg) ...

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