The Portal Paradox

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This video is about the Portal Paradox - a paradox in the video game Portal (and Portal 2) regarding whether or not a companion cube passing through a moving portal plops out of the other end with no speed (velocity, momentum), or shoots out at high speed. It’s a question of conservation of momentum, relativity of velocities, wormholes, 3D printers and quantum teleportation, glitches, and more.

REFERENCES

Conservation of momentum

https://en.wikipedia.org/wiki/Momentum#Conservation_in_a_continuum

... https://www.youtube.com/watch?v=B19nlhbA7-E