- #1
Dream Relics
- 27
- 3
Okay, so admittedly my background and knowledge base is pretty weak compared to most of you guys on here. I have been reading as much stuff stuff as I can find because I find physics and cosmology so very interesting. I just found today a physics tutorial series on youtube. The beginning lessons are about the equations for figuring acceleration, distance and time and that sort of thing, and a little bit so far on vector and scalar. But while watching it a hypothetical situation occurred to me. But it may well be that there are a lot of established limits on certain things that I am unaware of so forgive me if this is a silly question.
The question is this. If the rate of acceleration from gravity is a constant at 9.8 m/s/s? Then presumably, if someone dropped something from whatever the highest height is above that Earth from which something would fall without just floating away or going into orbit or whatever else might happen, then from that height there is a known maximum velocity that can be achieved by the falling object, of course forgetting about wind resistance and that sort of thing. So then I wondered, is the height of an influencing gravity field around a massive object always the same no matter how massive the object is, or if the object is more and more massive and the therefore the gravity more intense does the height away from the surface of that object of the gravity at the point where it would pull an object in increase? If it does increase, then is it possible to have a gravity field with enough height away from the surface that a falling object would then have enough time as it is falling to accelerate all the way up to the speed of light? it seems like if acceleration is always constant under gravity and there was sufficient distant for the object to cover before it made contact then that could happen. or if not, why not? I am really looking forward to having it explained to me why that won't work. So please tear me apart.
Though this one other thought occurs to me, if that can happen, then maybe somewhere beyond the observable universe there are super supermassive black holes that are doing just that to the distant galaxies, and that is what is causing the acceleration of the expansion all the galaxies out there.
The question is this. If the rate of acceleration from gravity is a constant at 9.8 m/s/s? Then presumably, if someone dropped something from whatever the highest height is above that Earth from which something would fall without just floating away or going into orbit or whatever else might happen, then from that height there is a known maximum velocity that can be achieved by the falling object, of course forgetting about wind resistance and that sort of thing. So then I wondered, is the height of an influencing gravity field around a massive object always the same no matter how massive the object is, or if the object is more and more massive and the therefore the gravity more intense does the height away from the surface of that object of the gravity at the point where it would pull an object in increase? If it does increase, then is it possible to have a gravity field with enough height away from the surface that a falling object would then have enough time as it is falling to accelerate all the way up to the speed of light? it seems like if acceleration is always constant under gravity and there was sufficient distant for the object to cover before it made contact then that could happen. or if not, why not? I am really looking forward to having it explained to me why that won't work. So please tear me apart.
Though this one other thought occurs to me, if that can happen, then maybe somewhere beyond the observable universe there are super supermassive black holes that are doing just that to the distant galaxies, and that is what is causing the acceleration of the expansion all the galaxies out there.