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Impossible_Pop620 OP t1_j27ccyr wrote

Reply to comment by B1tVect0r in Black hole question by Impossible_Pop620

Check out cardamoms Post above mine...he said crossing the event horizon (of a very large BH) would be unnoticeable

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B1tVect0r t1_j27d52v wrote

Imperceptible to the entity crossing the horizon emphatically does not mean that there are negligible or net zero forces acting on that entity.

If you had two hydrogen atoms separated by the width of the galaxy, they would still gravitationally influence each other.

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MethSiller- t1_j27jqan wrote

I’m a little new here but this piqued my interest. Can you give me a quick briefing on why they would influence each other at such a massive distance?

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B1tVect0r t1_j27k8fj wrote

Because that's how the math works. The equation that you use to determine gravitational force between two objects has the distance between them squared in the denominator, meaning that no matter how large you make it the value is never 0 (although it may be so infinitesimally small that for all intents and purposes it is nonexistent)

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MethSiller- t1_j27klzp wrote

Man… that’s interesting… and thought provoking. Thanks for taking the time to explain.

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Impossible_Pop620 OP t1_j27dmj6 wrote

That reply sounds like 'we don't know' what stresses might apply here

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Mike2220 t1_j27fdzd wrote

The effect of gravity on the object at the other end of the tether would be so strong you'd need an infinite amount of force to pull it out.

You're forgetting that the idea of the event horizon is that even light cannot escape as the effect of gravity is too strong.

If a massless photon does not have the energy to escape, then how could you ever accumulate enough to free something with mass.

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s1ngular1ty2 t1_j27dyhg wrote

Your entire line of posts shows you do not understand any of this stuff even remotely and are just spouting jargon you have heard from other people. People have explained it to you, you just don't understand it.

No tether can survive what you describe. You can't pull it back out because gravity is massively strong at the event horizon so you'd have to exert almost an infinite force to pull it back out which would rip the cable.

You are confusing someone floating across the event horizon with pulling something out because you lack the understanding of how forces work and how any of this works.

Floating across the event horizon is NOT THE SAME as pulling something back out.

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Impossible_Pop620 OP t1_j27e2qr wrote

Thanks man...you have mentioned this once or twice, I think. Dunno why you're still posting it, really...

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s1ngular1ty2 t1_j27edxw wrote

Because it's true and you are wrong...

LUL...

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rabbid_chaos t1_j27n4vy wrote

Honestly, judging from OPs replies, some of what he's asking would require a black hole to not behave like a black hole, which at that point it wouldn't be a black hole.

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angrymonkey t1_j27h362 wrote

> he said crossing the event horizon would be unnoticeable

...To a body that is in freefall.

A body that is suspended over the event horizon would be experiencing atom-crushing acceleration.

Compare to a familiar scenario: If you are freefalling towards the Earth, you can't tell apart your experience from one of floating in interstellar space (ignoring tides, which is what we neglect when we say the black hole is large). If you are standing on the surface of the earth, though, you are experiencing 9.8m/s^2.

Near the surface of the black hole, there would be so much acceleration required to counteract the gravity there that no material could possibly stay intact.

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