Why do we always take perpendicular height to calculate fluid pressure?
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This direction is because the force is exerted by a static or stationary fluid. Fluid pressure has no direction, being a scalar quantity. The forces due to pressure have well-defined directions: they are always exerted perpendicular to any surface.
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Explanation:
Pressure is the force per unit perpendicular area over which the force is applied, p=F/A. ... Pressure due to the weight of a liquid of constant density is given by p=ρgh p = ρ g h , where p is the pressure, h is the depth of the liquid, ρ is the density of the liquid, and g is the acceleration due to gravity.
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