According to general theory of relativity gravity is always attractive and there is no negative gravitational effect. If gravity is always attractive why the universe is expanding? All the matter is supposed to attract each other and come to one point.
2006-09-06 14:37:00 · 9 answers · asked by libranjiss 1 in Science & Mathematics ➔ Physics
Gravity is actually the weakest of the forces.
2006-09-06 14:50:43 · answer #1 · answered by nighthawk8713 3 · 0⤊ 0⤋
The question of whether or not the universes expansion is accelerating is still unresolved.
However, gravity opposes the inertial tendency generated by the big bang. However as things get further apart, gravitational attraction becomes weaker.
The qusetion today is :
"Can gravity slow down stuff enough before it gets too far apart.... if so, will gravitational attraction cause it to collapse back in on itself or is the unvierse tending towards a steady state solution?"
-T
P.S. all of you gravity is weakest posters. You have to put contect to your statement. Yes, gravity is the weakest of the forces. However in our macroscopic world, things tend to be largely electrically neutral. Therefore, human beings experience gravity WAY more than any of the other forces. In fact, on scales of the universe, gravity is the only force that matters.
2006-09-06 16:10:22 · answer #2 · answered by tomz17 2 · 0⤊ 0⤋
The physics is way to complicated for this forum. Put it this way, gravity is the weakest force in nature ... The BANG from the "big-bang" imparted sufficient force to overcome the attractive force of gravity..... however , and this is a biggie boys and girls , it has been established that the galaxies out on the farthest reaches of the universe are actually accelerating ! Common sense and physics says that this should not be so but it is an uncomfortable fact ... go figure.
2006-09-06 14:51:25 · answer #3 · answered by pocono58 2 · 0⤊ 0⤋
There's apparently not enough mass (..gravity) in the universe to stop the expansion. Not only that, but astronomers have discovered that the expansion rate of the universe is actually increasing, and some thought is now being given to the notion of some mysterious force to account for this, like "negative" or "anti" gravity.
2006-09-06 15:27:14 · answer #4 · answered by Chug-a-Lug 7 · 1⤊ 0⤋
The forces pushing the universe apart, resulting from the explosion of the Big Bang, are greater than the gravitational attraction overall. But still, in local areas of the universe, gravity wins out and clouds of dust are coalescing into new stars all the time.
2006-09-06 14:38:55 · answer #5 · answered by ? 6 · 1⤊ 0⤋
Gravity would seem to have much more effect on large astronomical bodies, like suns, planets, moons..etc. But In relation to a force that influences particles it is considered quite feeble, the Electro-magnetic, Weak and Strong forces rule the universe as it relates to particles. Perhaps gravity has played it's part in establishing galaxies and there components but the other forces drove the momentum of the expansion we see in the universe.
2006-09-06 14:53:58 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Not enough mass to overcome the initial expansion of the Big Bang, I guess. This probably means that the universe is not a black hole, or it would not be able to expand. On the other hand, some people think that the entire universe IS a black hole because we can't ever get outside it. I think that is a hairsplitting and question-begging argument.
2006-09-06 14:44:03 · answer #7 · answered by cdf-rom 7 · 0⤊ 0⤋
the expanding is still debated but if it is in fact expanding it would be due to inertia
2006-09-06 16:19:26 · answer #8 · answered by answerer 2 · 0⤊ 0⤋
i can add nothing to his answer
2006-09-06 14:42:42 · answer #9 · answered by camorningsurfer 4 · 0⤊ 0⤋