Fluids exert pressure in all directions from "summary" of Fundamentals of Physics, Volume 1 (Chapters 1 - 20) by David Halliday,Robert Resnick,Jearl Walker
When dealing with fluids, it is important to understand that they exert pressure in all directions. This concept is crucial in various applications of fluid mechanics. The pressure that a fluid exerts at a given point is the same in all directions. This means that the pressure at a point within a fluid is isotropic, or the same in all directions. To understand this concept better, let's consider a fluid contained in a closed vessel. The fluid molecules are in constant motion, colliding with each other and with the walls of the container. These collisions result in a force being exerted on the walls of the container. This force, per unit area, is what we refer to as pressure. The pressure exerted by the fluid is transmitted equally in all directions, as the molecules are moving randomly in all directions. When we talk about pressure in fluids, we are referring to the force per unit area that the fluid exerts on its surroundings. This pressure is a result of the coll...
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