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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
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
(a) body A having density of 500 kg m-3
What is the law of floatation?
Explain the following statement:
Sleepers are laid below the rails.
How does the liquid pressure on a diver change if:
the diver moves to the greater depth
A vessel contains water up to a height of 1.5 m. Taking the density of water 103 kg m-3, acceleration due to gravity 9.8 m s-2 and area of base of vessel 100 cm2, calculate: (a) the pressure and (b) the thrust at the base of vessel.
How is the upthrust related to the volume of the body submerged in a liquid?
Complete the following sentence :
Two balls, one of iron and the other of aluminium experience the same upthrust when dipped completely in water if _____________ .
A body weighs 450 gf in air and 310 gf when completely immersed in water. Find
(i) The volume of the body,
(ii) The loss in weight of the body, and
(iii) The upthrust on the body.
State the assumption made in part (i).
A block of wood is floating on water with its dimensions 50 cm x 50 cm x 50 cm inside water. Calculate the buoyant force acting on the block. Take g = 9.8 N kg-1.
If the buoyant force is less, the object will float.
