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When replying to this thread: https://www.physicsforums.com/threads/the-nasa-zero-gravity-flight.927136/

I became uncertain of my understanding of the physics after the plane starts to descend.

What I imagine happens is that your forward velocity would remain constant and you would be accelerated towards the Earth at about 9.8m/s

Assuming I have that correct my next question is what would limit the velocity of a mass approaching a black hole in a vacuum? I know matter cannot be accelerated to c, so what in physics describes the "terminal velocity" of mass? Is it simply the curvature of spacetime which limits the speed?

I became uncertain of my understanding of the physics after the plane starts to descend.

What I imagine happens is that your forward velocity would remain constant and you would be accelerated towards the Earth at about 9.8m/s

^{2}. The part I am most uncertain about is that since you are isolated from the air resistance in the atmosphere you would continue to increase velocity without bound until you pull up or crash.Assuming I have that correct my next question is what would limit the velocity of a mass approaching a black hole in a vacuum? I know matter cannot be accelerated to c, so what in physics describes the "terminal velocity" of mass? Is it simply the curvature of spacetime which limits the speed?

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