[Stark_GOP]

So why does that force exist? What causes it?

Newton's Law doesn't explain that. It simply provides a means for making statements about what force will result from two masses in any given observation. That's why it is not and has never been a theory.
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And it also doesn't explain why your posts make no sense.

[Dimensio]

And it also doesn't explain why your posts make no sense.

Perhaps you could tell me what about them you don't understand.