Hydrostatic pressure, and force

In summary, when asked to find the hydrostatic pressure on an object submerged in a liquid, you should use the gauge pressure, which is the pressure due to gravity from the fluid alone. This does not include any additional pressure from the atmosphere. The total pressure, or absolute pressure, is the sum of the hydrostatic pressure and any pressure at the surface. For example, when calculating the force on an underwater submersible's window, if the submersible is maintained at atmospheric pressure, then the total pressure on the window is just the hydrostatic pressure.
  • #1
Dell
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if i am asked to find the hydrostatic pressure on a certain object emerged in a liquid, am i meant to use the barometric or manometric pressure?

when asked for hydrostatic force, should i find the force on the object , or the force that the solution applies to the object??
 
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  • #2
Hydrostatic pressure is the at rest pressure (due to gravity) from the fluid alone and does not include the additional pressure at the surface (such as from the atmosphere). I would define the hydrostatic pressure as the gauge pressure, and total pressure (or absolute pressure) would be the sum of the hydrostatic (gauge) pressure plus the pressure at the surface, if any. Often say in a problem with an underwater submersible, you might want to calculate the force on a window from the water...If the submersible is maintained at atmospheric pressure within, then the total pressure on the window is just the hydrostatic pressure, as the atmospheric pressure term cancels out.
 

What is hydrostatic pressure?

Hydrostatic pressure is the pressure exerted by a fluid at rest due to the weight of the fluid above it.

How is hydrostatic pressure calculated?

Hydrostatic pressure is calculated by multiplying the density of the fluid by the acceleration due to gravity and the height of the fluid above the given point.

What factors affect hydrostatic pressure?

The factors that affect hydrostatic pressure include the density of the fluid, the acceleration due to gravity, and the height or depth of the fluid.

What is the relationship between hydrostatic pressure and depth?

As the depth of a fluid increases, so does the hydrostatic pressure. This is because the weight of the fluid above increases with depth, causing a higher pressure at deeper levels.

How is hydrostatic pressure used in real-life applications?

Hydrostatic pressure is used in various engineering and scientific fields, such as in designing and testing underwater structures, calculating blood pressure in the human body, and measuring water levels in reservoirs and tanks.

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