Does anyone know how to calculate how much force /pressure from wind at different speeds on a flat surface. Is there a simple calculation that can be used? Or is there a table that can be used I would like to know how much force is cause by a wind speed of 125mph on a flat surface. It would be good to know the force exerted for other speeds too

If you consider air as a fluid from the fluid dynamics you can calculate the force as rho times velocity times area. rho is density of air, velocity is of air and area is the area of the flat surface. Hope this will help. thanks

Quite simple, but I'll give it in Imperial units since I'm one of those dumb colonials dynamic pressure q = Â½?vÂ² where ? is the air density (.002378 slug/ftÂ³) v is velocity in ft/s, and q is in lbs/ftÂ² Thus a 125mph wind impinging directly on a flat surface exerts a dynamic pressure of 40 lbs/ftÂ²