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प्रश्न
Complete the following sentence :
A piece of wood is held under water. The upthrust on it will be ___________ the weight of the wood piece.
उत्तर
A piece of wood is held under water. The upthrust on it will be more than the weight of the wood piece.
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संबंधित प्रश्न
What causes buoyant force (or upthrust) on a boat ?
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
Which of the following will sink or float on water? (Density of water = 1 g Cm-3) body B having density 2520 kg m-3
Differentiate between thrust and pressure.
Explain the following statement:
It is easier to cut with a sharp knife than with a blunt one.
Describe an experiment to show that a body immersed in a liquid appears lighter than it really is.
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.
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 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.
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.
