bradland t1_j277vup wrote on December 30, 2022 at 3:36 AM

Reply to comment by Impossible_Pop620 in Black hole question by Impossible_Pop620

Infinitesimal fractions of a second. It is difficult to even conceive the forces that occur near a black hole.

Gravity on Earth is 1 g. A black hole with a mass equivalent to our Sun would have a gravitational force of around 1.6 trillion g. A very fast car like a Tesla Model S can accelerate at 1 g. A really fast missile can accelerate at 100 g. The gravity at the event horizon would accelerate every atom in the theoretical 10 km capsule 1.6 trillion times faster than a Tesla Model S, and hundreds of billions of times faster than the fastest rocket you can imagine.

The reality is that no capsule we could ever hope to construct would survive even approaching the event horizon, much less passing it and returning. No matter in the entire universe could survive it.

DurianBurp t1_j278u1r wrote on December 30, 2022 at 3:43 AM

That was a genuine joy to read and absorb.

stalagtits t1_j27dc4f wrote on December 30, 2022 at 4:19 AM

Pure acceleration by a black hole (or any other massive body), with no strong tidal forces present (as in a supermassive black hole), would be completely unnoticeable by the passenger of a capsule falling towards a black hole. Every atom in the capsule would experience the exact same acceleration, so there would be no net forces within the capsule.