Mechanics General

TORQUE

PRESSURE

Pressure is the effect of a force applied to a surface.  Mathematicaly :

p is the pressure

F is the normal Force

A is the area of the surface

Pressure Units
SI Units   (SI from French : Le Système international d’unités )

1 Pa    = 1N / m2           [Pa ]    Pascal

1 MPa  = 1N / mm2        [MPa]   MegaPascal

1 atm =  1Kgf / cm2 = 9.8N / cm2 = 98 000 Pa     [atm]   Atmosphere

Non SI Units

1 bar   = 100 000 Pa = 0.1 MPa

1 PSI   = 0.068948 bar                [PSI]    Pound Square Inch

Pascal Principle

P1 = P2

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