Fluid Pressure at a Point

Let us consider a fluid is at rest and this fluid puts pressure at a point O of small area dA. If the force acted on O is dF, then pressure can be given by-

Pressure, P = dF/ dA

Or,

P = F/ A (Suppose force is acted uniformly on the area A)

Unit of Pressure:

P = N/ m²

   = Pascal (Pa)

1 bar = 10⁵ Pa or 10⁵ N/m²