Pressure

 Pressure : 

Pressure is a physical quantity which is measure as force per unit area that is called pressure .


P = F /A   

  Lets A contains filled up to H height of  liquid (like water) and W force(weight of liquid) act on  the surface area of container(A)


Pressure = force /area

          then  F = Mg  ,

P = Mg/A         -----------(1)

We know that ,

Density = Mass /volume = M/A.H   , M = Density x A.H

From Equation (1)  

P =Density xA.H . g /A

Then,         P  =  Density(p) x g.h

P  = p.g.H


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