8. A 3m wide and 8m high rectangular gate is located at the end of a rectangular passage that is connected to a large open tank filled with water, as shown. The gate is hinged at its bottom and held closed by a horizontal force FHlocated at the gate's centre. Assume that the density of water is 1000 kg/m³. DeterAmine: (a) The magnitude and the vertical distance of the resultant hydrostatic force from the surface. (b) The minimum force FH required to support the gate. 15 m 4 m FH 4 m Hinge
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
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