Please, don't mind if my question is silly, but I was always wondering...
Imagine we have a negatively charged metailc wire. Let's assume it's just hanging on a thin rope. What force keeps electrons to fall on the ground and discharge the wire?
Electrons have mass. And according to laws of physics, everything with the mass will fall onto the earth with constant acceleration
g (if we skip the friction).
Moreover, electrons want to get away from each other. As we know, particles with same change repel each other. So why don't they just fall of the surface of the wire?
So there are two forces, thaw want extra elecrons out of the wire, but it does not happen. I just can't get it through my head.