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प्रश्न
What is the centre of buoyancy? State its position for a floating body with respect to the centre of gravity of the body.
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उत्तर
Centre of buoyancy: It is the point through which the resultant of the buoyancy forces on a submerged body act; it coincides with the centre of gravity of the displaced liquid, if the body is completely immersed.
For a floating body with its part submerged in the liquid, the centre of buoyancy is at the centre of gravity of the submerged part of the body and it lies vertically below the centre of gravity of the entire body.
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संबंधित प्रश्न
What is the other name of buoyant force ?
What causes buoyant force (or upthrust) on a boat ?
What happens to the buoyant force as more and more volume of a solid object is immersed in a liquid ? When does the buoyant force become maximum ?
A cork piece floats on water surface while an iron nail sinks in it. Explain the reason.
Explain why an iron needle sinks in water, but a ship made of iron floats on water.
A balloon filled with helium gas floats in a big closed jar which is connected to an evacuating pump. What will be your observation, if air from the jar is pumped out? Explain your answer.
Select the correct option:
When a body is wholly or partially immersed in a liquid, it experiences a buoyant force which is equal to:
What is meant by up thrust?
Complete the analogy.
Downward force : Weight :: Upward force offered by liquid : ______
