Pressure and fluid statics. Er Ranjit singh Asstt . Prof. D.M.E . S.G.G.S.W.U., Fatehgarh Sahib. Chapter 2. pressure. Pressure is defined as the amount of force exerted on a unit area of a substance:. Measuring Pressure. A manometer is a U-shaped tube that is partially filled with liquid.
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Er Ranjit singh
S.G.G.S.W.U., Fatehgarh Sahib
The pressure at point B is the pressure of the gas.
The atmosphere pushes on the container of mercury which forces mercury up the closed, inverted tube. The distance d is called the barometric pressure.
Atmospheric pressure is equivalent to a column of mercury 76.0 cm tall.
Pipe or tube
Pressure is a Normal Force
(acts perpendicular to surfaces)
It is also called a Surface Force
Apply a force F1 here to a piston of cross-sectional area A1.
The applied force is transmitted to the piston of cross-sectional area A2 here.
Types of Measurement
Principles: Hydrostatic Law
∆P=ρ g h
The magnitude of FRacting on a plane surface of a completely submerged plate in a homogenous fluid is equal to the product of the pressure PC at the centroid of the surface and the area A of the surface
Consider the top surface of a flat plate of arbitrary shape completely sub-merged in a liquid, as shown in Fig. together with its top view.
The resultant hydrostatic force FR acting on the surface is determined by integrating the force P dA acting on a differential area dA over the entire surface area,