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प्रश्न
A piece of wood if left under water comes to the surface. Explain the reason.
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उत्तर
A piece of wood if left under water comes to the surface of water because the upthrust on body due to its submerged part is equal to its own weight.
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संबंधित प्रश्न
A body experiences the same buoyant force while floating in water or alcohol.
Define the term relative density of a substance.
Why is the tip of an allpin made sharp?
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 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 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.
Is pressure a vector quantity?
Salt water provides less buoyant force than freshwater.
Assertion (A): The buoyant force on a submerged rigid object can be considered to be acting at the center of mass of the object.
Reason (R): In rigid body, force distributed uniformly through its volume can be considered to be acting at the centre of mass of the body.
