The center of buoyancy is defined as the geometric center of which part of the body?

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Study for the Junior Officer Surface Material Readiness Course Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

The center of buoyancy is defined as the geometric center of which part of the body?

Explanation:
Center of buoyancy is the centroid of the volume of fluid displaced. For a floating or partially submerged body, the displaced water comes from the portion of the body below the waterline, so the center of buoyancy lies at the geometric center of that submerged portion. If the object were fully submerged, it would be the centroid of the entire body, but in typical cases it’s the submerged part that determines buoyancy. The other options don’t fit because they refer to parts not displacing water (above the waterline or at the surface) or to the whole body only when fully submerged.

Center of buoyancy is the centroid of the volume of fluid displaced. For a floating or partially submerged body, the displaced water comes from the portion of the body below the waterline, so the center of buoyancy lies at the geometric center of that submerged portion. If the object were fully submerged, it would be the centroid of the entire body, but in typical cases it’s the submerged part that determines buoyancy. The other options don’t fit because they refer to parts not displacing water (above the waterline or at the surface) or to the whole body only when fully submerged.

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