The red force come from left and right atoms that compress atom. An atom receive pressure from top (in a liquid under gravity like you put an object in a swimming pool). But atom receive pressure from another atoms in the same depth (black arrows) this give red force.mikeph said:I do not understand the question. What is the red force?
mikeph said:I do not understand the question. What is the red force?
CWatters said:The pressure at a "point" in a liquid is the same in all directions. No?
Gh778 said:For compute force from pressure on a surface, do I need take in account the red force ? When an atom press a surface it press atoms at right and at left, this increase the pressure on the curved surface if the volume is closed ?
Or temperature cancel red forces ?
Gh778 said:1/ This would say the pressure on a dam http://en.wikipedia.org/wiki/Dam is bigger due to these forces ?
2/ If I place a tube full of liquid like the image show:
http://imageshack.us/a/img801/3471/3btm.jpg
Red forces in the curvature are canceled by axis. But like sum of forces of all the tube is always zero, there are Fa and Fb forces. How the sum of torque can be to zero ?
The forces in the curved part of the tube will not be exactly axial
The pressure is the pressure. It is what it is and isn't two different pressures at once. It does not get concentrated or focused by varying the shape of the container. This is a basic principle of how pressure works. And I'm quite sure we've explained this to you before.Gh778 said:For compute force from pressure on a surface, do I need take in account the red force ? When an atom press a surface it press atoms at right and at left, this increase the pressure on the curved surface if the volume is closed ?
Pressure on a curved surface is the amount of force per unit area exerted on the surface. It is the result of the weight of the fluid above the surface and the curvature of the surface itself.
On a curved surface, the pressure varies depending on the curvature of the surface. The pressure is greater on a surface with a smaller radius of curvature, and lower on a surface with a larger radius of curvature.
The main difference between pressure on a curved surface and pressure on a flat surface is that on a curved surface, the pressure varies depending on the curvature, while on a flat surface, the pressure is constant and uniform.
The shape of a container can affect the pressure on a curved surface by changing the curvature of the surface. For example, a container with a smaller radius of curvature will exert a higher pressure on the curved surface compared to a container with a larger radius of curvature.
Pressure on a curved surface is an important concept in various fields, such as fluid mechanics, aerodynamics, and structural engineering. Some specific applications include calculating the pressure on the wings of an airplane, determining the strength of a curved dome structure, and understanding the behavior of fluids in pipes or containers with curved surfaces.