How fast do things accelerate towards the center of a black hole?

Question

If things approach a velocity equal to the speed of light when approaching the center of a black hole then wouldn't their masses approach infinity? Therefore once a black hole has established itself would it not proceed to add infinite mass to our universe ?

Answer 1

Firstly, it's an archaic interpretation to say that mass increases as velocity approaches that of light. The word "mass" is today used exclusively to refer to rest mass.

It also depends on what you mean by "velocity" within the black hole. An observer outside the hole never sees anything fall in because an outside observer observes time to slow down to zero at the event horizon. Nevertheless, an observer hovering just above the hole sees objects fall in at nearly c. The closer a hovering observer is to the event horizon, the closer to c he will observe falling objects pass him by.

In any case, any object falling in has a finite amount of energy as seen by any given observer, which is conserved. To the distant observer who gently drops a mass m into the hole, the mass m always has conserved total energy mc^2, and this is the energy (=mass) added to the hole when it falls in.

Answer 2

I agree most with campbelp 2002. Measured by our clocks it takes an infinite time to fall into a black hole, but measured on the falling object it only takes a few minutes.If you were on a space capsule falling in, your instruments would tell you that just as you approached the event horizon, you were about to reach the speed of light. Your mass depends on how deep you are in a gravitational potential well, as well as how fast you're moving, according to general relativity, so if we at a safe distance had a way to determine your mass it would stay the same; the increase due to your speed and decrease due to you falling down the well would cancel out. As you fell toward the event horizon, if you looked away from the black hole, you'd see the rest of the universe evolving faster and faster as your time frame slowed down. The galaxies would be blue-shifted, and they'd all get closer to the point in your field of view directly away from the black hole. Just before you crossed the event horizon they'd all converge to a point directly behind you.

Answer 3

It isn't that simple. Relativity never is. In addition to mass increasing, length shrinks and time slows down. In theory, it takes infinitely long for a black hole to form because time slows to a stop at the speed of light. So all the things we are calling black holes are really just super dense collapsing objects that in theory could become black holes after infinite time has passed.

Answer 4

Anything that falls into a black hole will come nowhere close to the speed of light, the total mass of the universe cannot be exceeded.

Answer 5

In theory yes. However, there is probably some point where the math and the reality depart from each other. After all, to attain the speed of light, one would have to provide infinite energy

Answer 6

Damn the torpedoes, full speed ahead!!! But what if you use your lunar laser blaster??? That could slow things down a bit if you blast a few moons on the way in.

Answer 7

relies upon on the black hollow... a "new" black hollow - particularly small, with lots a rely swirling around it - would be emitting distinctive radiation; x-rays, gamma rays, etc - and you will finally end up dying of that till now you eventually make the leap. As you shut to the form horizon, the tidal forces are stable adequate that your physique could be ripped aside till now 'crossing over.' as quickly as you progression previous the form horizon, nicely... that is in easy terms a wager, yet maximum think of you're making the quick, rapid adventure to persist with your mass to the dimensionless element the place all the mass of the black hollow is placed. in the adventure that your physique wasn't ripped aside exterior the form horizon, it is going to likely be interior, the place the gravitational rigidity between your head & ft could be a number of *hundred* circumstances extra advantageous (depending on which end is nearer to the black hollow...) Now... a super-huge black hollow, with an adventure horizon of a number of easy-hours or extra, would not have an identical kinds of forces exterior the form horizon - you will swirl down in the direction of it, however the version in forces isn't adequate to tear your physique aside. this is... not till you *bypass* the form horizon. as quickly as interior, the version in gravitational rigidity out of your head on your ft isn't as super as with a small black hollow, yet as you're drawn nearer, the version grows. finally, your physique will stretch till that is finally ripped aside - and back.... all your mass provides to the black holes' mass, and the form horizon gets merely little extra desirable out...

Answer 8

due to the theory of relativity speeds can not reach the speed of light.

Answer 9

beyond the speed of light

Answer 10

things don't get to velocity equal to the speed of light, but close
close but no cigar