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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
Name the scientist who gave he magnitude of buoyant force acting on a solid object immersed in a liquid.
Define the term relative density of a substance.
What is the unit of relative density?
For a floating body, how is its weight related to the buoyant force?
Explain why an iron needle sinks in water, but a ship made of iron floats on water.
A dam has broader walls at the bottom than at the top. Explain.
How does the liquid pressure on a diver change if :
The diver moves horizontally?
A beaker contains a liquid of density ‘ρ’ up to height ‘h’ such that ‘PA’ is atmospheric pressure and ‘g’ is the acceleration due to gravity. Answer the following questions:
- What is the pressure on the free surface of the liquid?
- What is the pressure on the base of the beaker?
- What is the lateral pressure at the base on the inner walls of the beaker?
Select the correct option:
The phenomenon due to which a solid experiences upward force when immersed in water is called:
The point at which the force of buoyancy is supposed to act is known as ______.
