The Earth is smoother than a cue ball, I know that. Nearly 8,000 miles diameter and the deepest surface depth is about 7 miles. That is SMOOTH.
Low earth orbit is only about 200 miles up, they are skimming the upper atmosphere in effect.
They "fall" inwards at the same rate they go parallel to the planet, about 17,0000 mph.
We call it zero g, but more aptly it is "free fall", which any object experiences (mostly) if not under thrust and not in contact with a surface. A cannon ball does it, until it hits ground, ballistic trajectory (mostly).