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प्रश्न
What is meant by the term buoyancy?
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उत्तर
The property of a liquid to exert an upward force on a body immersed in it is called buoyancy.
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संबंधित प्रश्न
Relative density of a substance is expressed in g cm-3.
What is the law of floatation?
How does the pressure exerted by thrust depend on the area of surface on which it acts? Explain with a suitable example.
State the laws of liquid pressure.
The pressure of water on the ground floor is 40,000 Pa and on the first floor is 10,000 Pa. Find the height of the first floor. (Take : density of water = 1000 kg m-3, g = 10 m s-2)
A body experiences an upthrust F1 in river water and F2 in sea water when dipped up to the same level. Which is more, F1 or F2? Give reason.
A small block of wood is completely immersed in (i) water, (ii) glycerine and then released. In each case, What do you observe? Explain the difference in your observation in the two cases.
A metal solid cylinder tied to a thread is hanging from the hook of a spring balance. The cylinder is gradually immersed into the water contained in a jar. What changes do you expect in the readings of the spring balance? Explain your answer.
What do you mean by buoyancy?
Consider the statement given below and choose the correct option.
Assertion: Water strider slides easily on the surface of the water.
Reason: Water strider experiences less buoyant force.
