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

Links of Previous Main Topic:-

• Introduction about air standard cycles
• Properties of pure substances introduction
• Vapour compression refrigeration cycle introduction
• Basic fluid mechanics and properties of fluids introduction
• Fluid statics introduction
• Fluid pressure at a point

Links of Next Mechanical Engineering Topics:-

• Pascals law
• Pressure density height relationship
• Atmospheric gauge vacuum and absolute pressure
• Static and total pressure
• Manometers measurement pressure
• Fluid kinematics
• Bernoullis equation
• Basics and statics of particles introduction
• Equilibrium of rigid bodies introduction

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