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प्रश्न
The weight of a body floating in a liquid is ........
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उत्तर
zero.
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संबंधित प्रश्न
The density of water is 1.0 g Cm-3. The density of iron is 7.8 × 10″3 g Cm-3. The density of mercury is 13.6 g Cm-3.
Answer the following:
Will a piece of iron float or sink in mercury?
Write an expression for the pressure at a point inside a liquid. Explain the meaning of the symbols used.
Complete the following sentence :
Pressure at all points at the same depth is ....................
The pressure P1 at a certain depth in river water and P2 at the same depth in sea water are related as :
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.
What do you understand by the term upthrust of a fluid? Describe an experiment to show its existence.
Why is a force needed to keep a block of wood inside water?
Complete the following sentence :
Two balls, one of iron and the other of aluminium experience the same upthrust when dipped completely in water if _____________ .
Complete the analogy.
Downward force: Weight:: Upward force offered by liquid: _____
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.
