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Combining two different internet debates
(sopuli.xyz)
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this post was submitted on 18 Aug 2023
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All motion is relative. To understand how the people will move, we need to look at them relative to the portal. If the trolly is moving at 5 m/s relative to the ground, then the people are moving at 1 m/s relative to it. So they enter the portal moving at 1 m/s and exit at the same speed.