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प्रश्न
The S.I. unit of upthrust is :
पर्याय
Pa
N
kg
kg m2
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उत्तर
The S.I. unit of upthrust is : N
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संबंधित प्रश्न
State whether the following statement is true or false :
The buoyant force depends on the nature of object immersed in the liquid
Name the force which makes heavy objects appear light when immersed in a liquid.
What is a density bottle? How is it used to find the density of a liquid?
The density of water is 1.0 g Cm-3. The density of iron is 7.8 × 10″3 g Cm-3. The density of mercury is 13.6 g Cm-3.
Ans the following:
Will a piece of iron float or sink in water?
How does the liquid pressure on a diver change if:
the diver moves to the greater depth
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.
- Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g cm-3.
- Will the height of the water column in part (a) change if the cross-section of the water column is made wider?
A piece of wood if left under water comes to the surface. Explain the reason.
You are provided with a hollow iron ball A of volume 15 cm3 and mass 12 g and a solid iron ball B of mass 12 g. Both are placed on the surface of water contained in a large tub.
- Find upthrust on each ball.
- Which ball will sink? Give a reason for your answer (Density of iron = 8.0 g cm-3)
What is the centre of buoyancy? State its position for a floating body with respect to the centre of gravity of the body.
