Question
Define pressure. What is the relation between pressure, force and area? State the units in which pressure is measured.
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Answer
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 $(N/m^2$ or $kg/m.s^2)$, 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:$\text{P}= \frac{\text{F}}{\text{A}}$
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.
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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