Question

The position of the center of pressure on a plane surface immersed vertically in a static mass of fluid is
a) at the centroid of the submerged area
b) always above the centroid of the area
c) always below the centroid of the area
d) none of the above​

Answer 1

Answer:

The centre of pressure for a vertical surface submerged in a liquid lies above the centroid (centre of gravity) of the vertical surface.

it means your answer is (b)

Answer 2

The position of the center of pressure on a plane surface immersed vertically in a static mass of fluid is c) Always below the centroid of the area.

c) Always below the centroid of the area:

The pressure gradient increases as you go deeper into the fluid, whereas an object's center of gravity does not change. As a result, the pressure center is always below the area centroid.

Explanation for incorrect answer:

a) At the centroid of the submerged area:

The center of pressure for a vertical surface submerged in a liquid is located above the vertical surface's centroid. So it is the wrong answer.

b) always above the centroid of the area:

Because the magnitude of varying pressure forces on the surface above the centroid is greater than the magnitude of varying pressure forces on the surface below the centroid, the center of pressure will be located above the centroid. So it is the wrong answer.

d) none of the above​:

The center of pressure on a plane surface immersed vertically in a static mass of fluid is always below the area's centroid. so none of the above is the wrong answer.

Hence, the position of the center of pressure on a plane surface immersed vertically in a static mass of fluid is always below the centroid of the area.

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