[amp_mcq option1=”The horizontal component of the hydro-static force on any surface is equal to the normal force on the vertical projection of the surface” option2=”The horizontal component acts through the center of pressure for the vertical projection” option3=”The vertical component of the hydrostatic force on any surface is equal to the weight of the volume of the liquid above the area” option4=”he vertical component passes through the center of pressure of the volume” correct=”option1″]
The correct answer is A. The horizontal component of the hydro-static force on any surface is equal to the normal force on the vertical projection of the surface.
The horizontal component of the hydrostatic force is equal to the weight of the liquid above the area times the cosine of the angle between the surface and the horizontal. The normal force on the vertical projection of the surface is equal to the weight of the liquid above the area. Therefore, the horizontal component of the hydrostatic force is not equal to the normal force on the vertical projection of the surface.
The vertical component of the hydrostatic force is equal to the weight of the liquid above the area. The vertical component passes through the center of pressure of the volume.
The center of pressure is the point on a surface where the total force of the fluid acting on the surface is applied. The center of pressure is located below the surface, and its depth is equal to one-third of the depth of the fluid.