Hello everyone, I have a physics question on pressure exerted by a fluid onto an object (see attachment). I would like to know how I can calculate the total pressure exerted on an object in a vessel by flowing fluid (water) with an open outflow. It has been too long since I took college physics, a class that I did not do particularly well in. I would be grateful to anyone who could point me in the right direction. Tangential question: I'm also a bit confused about atmospheric pressure and the pressure in the human body. If the atmospheric pressure is ~700 mmHg, how can blood vessels (15 mmHg) have a lower pressure? I thought it was the other way around?