Difference between Centroid and Centre of Pressue

[Yam]

Homework Statement

What is the difference between the Centre of Pressure and Centroid

Homework Equations

The Attempt at a Solution

My understanding is that the centre of pressure acts on a centroid. So, how come they can be on different positions for a submerged surface?

 

[RUber]

If pressure is applied evenly to a flat surface, then the center of pressure is the centroid. If a submerged surface is at an angle, then the pressure is not constant across the surface.

 

[SteamKing]

If pressure is applied evenly to a flat surface, then the center of pressure is the centroid. If a submerged surface is at an angle, then the pressure is not constant across the surface.

Even if the submerged surface is perfectly vertical, the centroid and the c.p. don't coincide because of the pressure gradient due to Pascal's Law where P = ρgh.

 

[haruspex]

Even if the submerged surface is perfectly vertical, the centroid and the c.p. don't coincide because of the pressure gradient due to Pascal's Law where P = ρgh.

Likely RUber meant at an angle to the horizontal, which would include 90 degrees.