Why do like charges and poles repel in the long run?

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In summary, the forces of gravity, electric, and magnetic all aim to minimize their energy and be as low as possible. While gravity is only attractive, it doesn't make sense for electric and magnetic forces to have a repulsive quantity. If like charges did not repel, the universe would not function properly. The universe started at one point and was moved apart, so it is assumed that gravity will eventually bring everything back together. However, with repulsive forces present, it is unclear how an outside force could keep the universe together before the big bang. It is important to note that Physics Forums has guidelines for discussing certain topics in the main forums.
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Denton
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All the forces aim in the direction of minimising their energy to be as low as possible. Gravity pulls things down, energy was put into the object to move it away in the start however gravity is only attractive. It doesn't make sense that with the electric and magnetic forces to have a repulsive quantity to them. They are at lowest energies when they are infinitely appart?

Could there be some reason why in the long run same charged particles or same pole magnetic fields repell?
 
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How else could it be ? If like charges did not repel, the universe would fall apart ( and people's hair would not stand up in that freaky way).

Gravity pulls things down
The moon's gravity is pulling me 'up' when it is overhead !

It doesn't make sense that with the electric and magnetic forces to have a repulsive quantity to them.
Why not ?
 
  • #3
The universe started at one point. Work was done to move them appart to where they are now, so i assume they will come back together due to gravity (dont kill me on this one lol, i know the universe is accelerating but bear with me). Since they have repulsive quantities to them, they would not be in a state of rest prior to the big bang so how could there be an outside force there keeping them together if all known energy of the universe is there at that exact spot.
 

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