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प्रश्न
Why is a force needed to keep a block of wood inside water?
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उत्तर
A force is required to hold a block of wood in water because the upthrust caused by water on the block when fully submerged surpasses its weight.
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संबंधित प्रश्न
Why does a block of wood held under water rise to the surface when released ?
Relative density of a substance is expressed in g cm-3.
Distinguish between density and relative density.
How does the density of a body and that of a liquid determine whether the body will float or sink into that liquid?
A plastic cube is released into the water. Will it sink or come to the surface of the water?
State whether pressure is a scalar or vector?
Describe a simple experiment to demonstrate that a liquid enclosed in a vessel exerts pressure in all directions.
Write an expression for the pressure at a point inside a liquid. Explain the meaning of the symbols used.
A body will experience minimum upthrust when it is completely immersed in :
Consider the statement given below and choose the correct option.
Assertion: Water strider slides easily on the surface of the water.
Reason: Water strider experiences less buoyant force.
