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प्रश्न
It is easier to lift a heavy stone under water than in air. Explain.
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उत्तर १
It is easier to lift a heavy stone under water than in air because in water, it experiences an upward buoyant force which balances the actual weight of the stone acting downwards. Thus, due to upthrust there is an apparent loss in the weight of the heavy stone, which makes it lighter in water, and hence easy to lift.
उत्तर २
It is easier to lift a heavy stone under water because in water an upthrust acts on the upward direction which reduces the apparent weight of the stone and makes it easy to lift.
संबंधित प्रश्न
Name the scientist who gave he magnitude of buoyant force acting on a solid object immersed in a liquid.
Fill in the blank with suitable word :
It is the................. force which makes objects appear lighter in water.
A body floats in a liquid when its weight becomes equal to the weight of the liquid displaced by its submerged part.
State whether thrust is a scalar or vector?
Why is the tip of an allpin made sharp?
How does the pressure exerted by a solid and fluid differ?
Complete the following sentence :
Pressure at a depth h in a liquid of density p is ......................
The area of base of a cylindrical vessel is 300 cm2. Water (density= 1000 kg m-3) is poured into it up to a depth of 6 cm. Calculate : (a) the pressure and (b) the thrust of water on the base. (g = 10m s-2.
The point at which the force of buoyancy is supposed to act is known as ______.
Salt water provides less buoyant force than freshwater.
