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प्रश्न
Fill in the blank with suitable word :
It is the................. force which makes objects appear lighter in water.
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उत्तर
It is the buoyant force which makes objects appear lighter in water.
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संबंधित प्रश्न
In what direction does the buoyant force on an object immersed in a liquid act?
The density of a body which sinks in water is ......... than 1000 Kg m-3.
Name the S.I. unit of density. How is it related to g Cm-3?
Distinguish between density and relative density.
Why does a piece of ice float on water?
What physical quantity is measured in bar?
A block of iron of mass 7.5 kg and of dimensions 12 cm × 8 cm × 10 cm is kept on a table top on its base of side 12 cm × 8 cm.
Calculate:
- Thrust and
- Pressure exerted on the table top
Take 1 kgf = 10 N.
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 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.
Assertion (A): The buoyant force on a submerged rigid object can be considered to be acting at the center of mass of the object.
Reason (R): In rigid body, force distributed uniformly through its volume can be considered to be acting at the centre of mass of the body.
