Forces on a plane in fluid Plane areaa F T Resultant force Fr on a plane can be resolved into perpendicular component N o tangential component F T Pressure p is defined as: P= Normal force per unit area=FN/A Shear stress t is defined as: t=Tangential force per unit area=F/A In Fluid statics, Ft=0, only P existForces on a Plane in Fluid Resultant force FR on a plane can be resolved into : • perpendicular component FN • tangential component FT • Pressure P is defined as: P = Normal force per unit area = FN / A • Shear stress  is defined as:  = Tangential force per unit area = FT / A • In Fluid statics, FT = 0, only P exists FR FN FT Plane Area A