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प्रश्न
What is meant by the term ‘buoyancy’ ?
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उत्तर
Buoyancy is an upward force exerted by a fluid that opposes the weight of an immersed object.
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संबंधित प्रश्न
Fill in the blank with suitable word :
It is the................. force which makes objects appear lighter in water.
When a boat is partially immersed in water, it displaces 600 kg of water. How much is the buoyant force acting on the boat in newtons ? (g = 10 m s-2)
How does the density of a body and that of a liquid determine whether the body will float or sink into that liquid?
Why does a piece of ice float on water?
A plastic cube is released into the water. Will it sink or come to the surface of the water?
Explain the following statement:
It is easier to cut with a sharp knife than with a blunt one.
Pressure at the free surface of a water lake is P1, while at a point at depth h below its free surface is P2. (a) How are P1 and P2 related? (b)Which is more P1 or P2?
A homogeneous block floats on water (a) partly immersed (b) completely immersed. In each case state the position of centre of buoyancy B with respect to the centre of gravity G of the block.
In a fluid, buoyant force exists because the pressure at the ______ of an object is greater than the pressure at the top.
If the buoyant force is less, the object will float.
