First post Heey Why does the air move at the same velocity as the earth ? Assuming there is no wind. I fear my question will be misunderstood so I'll expand a bit. The zero velocity for air (no wind) is the same velocity as the earth. Wind = slower/higher velocity relative to the velocity of the earth. How comes the air has the same basic velocity ? I read the earth velocity is .47 km/sec. So to stretch it even further If I'm standing still relative to the center of the earth and there was no friction between me and the earth (moving at .47 km/sec but myself at 0mm/sec). I should essentially glide on the surface of the earth. but the air around me should make me eventually go .47km/sec with time. Is that statement true ? and is that what is happening with the air around us, hitting the irrugalirities of the earth so it eventually goes at the same velocity ? And third but not least : how do you write irregularities. ha got it, kept the first one because it was funny.