Pascal's Principle
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Pascal's Principle :  A change in pressure applied to an enclosed fluid is transmitted undiminished to every point of the fluid & the walls of the container .

APPLICATIONS ON PASCAL’S PRINCIPLE :

THE HYDRAULIC PRESS

The ideal press consists of two pistons of areas ( a , A ) enclosed between them incompressible liquid as in figure

When a small force ( f ) acts on the small piston ( a ) , it exerts a pressure ( p = f/a ).  

The increase in pressure P is equally transmitted to every part of the liquid & to the  walls of the container according to Pascal's Principle till it acts on the large piston ( A ) to produce very large force ( F = P x A ) causes the load to rise .                       

To keep the large piston  (A) at equilibrium with the small one (a) a load = F is placed on the large piston .

      \ P = f/a = F/A       

      \ F a A ( Force multiplying device) 

The hydraulic press is applied in our daily life in:

1.Car’s hydraulic breaks.

2.Car’s hydraulic jack.