Hey guys, I'm trying to prove to a friend something but I couldn't find a proof online. Imagine wind coming in from the side and hitting an upright cylinder. We're trying to find the force exerted, which then requires which kinda of cross section to use. I think the best way to calculate it is by using the a rectangle with the dimensions 2*r*h. since all the wind is not hitting the curved surface perpendicular, it's not correct to use a curved surface model, which would be (2Pi*r*h)/2. I know this is basic physics but sometimes it's the basic you need to know down well. What do you think? Thank you for the help.