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प्रश्न
A piece of wood if left under water comes to the surface. Explain the reason.
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उत्तर
A piece of wood if left under water comes to the surface of water because the upthrust on body due to its submerged part is equal to its own weight.
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संबंधित प्रश्न
A body experiences the same buoyant force when it floats or sinks in water.
Define the term relative density of a substance.
What physical quantity is measured in bar?
State whether pressure is a scalar or vector?
The S.I. unit of pressure is :
What do you understand by the term upthrust of a fluid? Describe an experiment to show its existence.
Will a body weigh more in air or vacuum when weighed with a spring balance? Give a reason for your answer.
How is the upthrust related to the volume of the body submerged in a liquid?
The mass of a block made of certain material is 13.5 kg and its volume is 15 × 10-3 m3.
(a) Calculate upthrust on the block if it is held fully immersed in water.
(b) Will the block float or sink in water when released? Give a reason for your answer.
(c) What will be the upthrust on block while floating?
Take density of water = 1000 kg m-3.
A body of mass 3.5 kg displaces 1000 cm3 of water when fully immersed inside it. Calculate:
- the volume of body,
- the upthrust on body and
- the apparent weight of body in water.
