I am having trouble relating the two quantities of dynamics and static pressure in: 1/2p*v^2 + p = constant, bernoullis equation, to corresponding physical descriptions. In what way do the air molecules act to create both dynamic and static pressure, respectivley? As far as i know, dynamic pressure results from the collisions of air rushing over an airfoil colliding with its surface, as the velocity (and momentum) increase these collisions are more forceful and thus the pressure increase. But if this is the case, then what type of collision during this process defines the static pressure? My main concern here is with static pressure, how does it occur? and why does it decrease with increases in flow speed?