Hello! I've been confused about fluid statics, to be more specific, about the hydrostatic pressure. supposedly i have a cylindrical barrel of height h and radius of r: (a). if i were to calculate the total Force inside the barrel, do i use the (Force on the lid + Force on the Sides + Force on the bottom) while the pressure on the sides is defined as an integration of the dF = P * dA ? (b).how about the pressure? and (c) i suppose you guys have seen the Pascal's Experiment on Bursting the barrel with a long tube on top of the barrel filled with water. is the pressure inside the barrel only the hydrostatic pressure of the water inside the tube plus the average pressure inside the barrel ( i suppose the atmospheric pressure cancels out because it's applied to the tube and the barrel) , or i can just calculate the force by using the hydrostatic pressure of the water + the integration of the dF on the sides of the barrel, and the Force on the lid and bottom? if i have to use the average pressure, why? thanks! forever in curiousity, Usamah Jundi Abdillah.