PhySP18SS5.4.30 Okay . . . so now when there is a breeze (either caused by wind blowing past an object or the object moving through “calm” air, more of the air molecules are flowing in one direction (this is called LAMINAR FLOW). When you are in a laminar flow situation, more air molecules (you can also, of course, do this with water molecules) are flowing in the same direction and the amount of Brownian Motion is reduced. There are less air molecules (or water molecules) to bounce off the sides of a tube they are in so the amount of molecules hitting the side are reduced and therefore the pressure (F/A) is reduced.