Q. 63 A3.6( 26 Votes )
Define pressure. What is the relation between pressure, force and area? State the units in which pressure is measured.
Pressure is defined as a measure of the force applied over a unit area. Pressure often is expressed in units of Pascals (Pa), newtons per square meter (N/m2 or kg/m.s2), or pounds per square inch. Other units include the atmosphere (atm), torr, bar, and meters sea water (msw).
In equations, pressure is denoted by the capital letter P or the lowercase letter p.
Pressure is a derived unit, generally expressed according to the units of the equation:
P = F / A
where P is pressure, F is force, and A is area
P is pressure
F is the component of force perpendicular to the surface
A is the area of the surface
When a force is constant over an area, the pressure acting on that area is simply
Pressure is a scalar quantity, thus it acts in all directions at any given point. In order for pressure to create a force, the pressure must be integrated over some area.
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