Pressure Force
Pressure Force - Related Videos
01:04
Hydrostatic Pressure Force on a Plane Surface
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2025
When a plane surface is submerged in a fluid, hydrostatic forces develop on the surface due to the fluid's pressure. For horizontal surfaces, the pressure exerted by the fluid is uniform because the depth remains constant. The resultant force is determined by the pressure at the given depth multiplied by the area of the surface, and it acts through the centroid of the surface. For vertical surfaces, the pressure varies with depth, increasing as the distance from the fluid's free surface...
01:04
Hydrostatic Pressure Force on a Curved Surface
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2025
Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
02:34
Vapor Pressure
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2020
When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules move randomly about, they will occasionally collide with the surface of the condensed phase, and in some cases, these collisions will result in the molecules re-entering the condensed phase. The change from the gas phase to the liquid is called condensation. When the rate of condensation becomes equal to the rate of vaporization, neither the amount of the liquid nor the amount of the vapor...
03:13
Intermolecular Forces
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2020
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
FAQs
Because the force is normal to the surface, its effect must be considered together with the surface orientation. A pressure acting on a horizontal surface and one acting on a vertical surface can therefore produce different directions of motion, deformation, or support, even when their pressure values are equal.
When pressure is not uniform, using one pressure value can misrepresent the load. The surface is divided conceptually into parts, and the force contribution from each part is determined from its local pressure and area. Adding those contributions gives the total pressure force, which is essential for analyzing containers or other surfaces exposed to changing pressure.
For uniform pressure, the total force increases directly with the affected area because F = pA. At the same pressure, doubling the area doubles the force applied to the surface. This relationship explains why the size of a piston, container wall, or supporting surface influences the resulting motion, deformation, or load.
Surface orientation determines the direction in which each pressure force acts, so the arrangement of surfaces affects whether forces provide support or produce motion. In equilibrium analysis, the relevant pressure forces must be considered across the surfaces involved. The same approach helps evaluate structural loading in containers, dams, and other systems.
First identify the pressure acting on the piston and the area exposed to it. For a uniform pressure, multiply these quantities using F = pA, then assign the force perpendicular to the piston surface. Comparing the resulting force with the opposing forces helps determine how the hydraulic system produces support or motion.
The analyst identifies the surfaces exposed to the fluid and determines whether pressure is uniform or varies across them. Uniform regions can use F = pA, whereas changing pressure requires summing contributions over the surface. The resulting total force describes the structural loading that the dam or container must support.
Buoyancy can be examined by considering the pressure forces acting across the surfaces of an object in a fluid. Summing those surface contributions gives the overall pressure-force effect, which can provide support. This connects the general analysis of distributed loading with the study of floating or supported objects in physics.