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प्रश्न
A plastic cube is released into the water. Will it sink or come to the surface of the water?
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उत्तर
When a plastic cube is released into water, it will come to the surface and float if its density is lower than the density of water. This happens because of buoyancy. Water exerts an upward buoyant force on the cube, and if this force is equal to or greater than the cube’s weight, the cube floats.
In this experiment, the plastic cube floats because it is less dense than water. In contrast, a glass cube usually sinks because its density is greater than that of water, so its weight is greater than the buoyant force acting on it.
संबंधित प्रश्न
What is meant by the term ‘buoyancy’ ?
Explain the meaning of the statement
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(a) body A having density of 500 kg m-3
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Differentiate between thrust and pressure.
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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.
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.
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What do you understand by the term “Buoyancy”.
