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A block of wood is floating in water in a closed vessel as shown in the figure. The vessel is connected to an air pump. When more air is pushed into the vessel, the block of wood floats with (neglect compressibility of water)

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Important Questions on Fluid Mechanics

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JEE Advanced

IMPORTANT

Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 6 - Fluid Mechanics>Exercises>Q 6

A wooden rod of a uniform cross section and od length

120 c m

is hinged at the bottom of the tank which is filled with water to a height of

40 c m .

in the equilibrium position, the rod makes an angle of

60 °

with the vertical. The centre of buoyancy is located on the rod at a distance (from the hinge) of

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JEE Advanced

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Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 6 - Fluid Mechanics>Exercises>Q 7

An iceberg is floating partially immersed in seawater. The density of seawater is

1.03 g c m^{- 3}

and that of ice is

0.92 g c m^{- 3}

. The approximate percentage of the total volume of iceberg above the level of seawater is -

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JEE Advanced

IMPORTANT

Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 6 - Fluid Mechanics>Exercises>Q 8

Equal masses of three liquid are kept in three identical cylindrical vessels

A, B

and

C .

Their densities are

ρ_{A}, ρ_{B}

and

ρ_{C}

with

ρ_{A} < ρ_{B} < ρ_{C} .

The force on the base will be

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JEE Advanced

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Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 6 - Fluid Mechanics>Exercises>Q 9

A lawn sprinkler has

20

holes, each of cross-sectional area

2.0 \times 10^{- 2} {cm}^{2}

and is connected to a hosepipe of cross-sectional area

2.4 {cm}^{2}

. If the speed of water in the hose-pipe is

1.5 m s^{- 1}

, the speed of water as it emerges from the holes is,

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Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 6 - Fluid Mechanics>Exercises>Q 10

A block of silver of mass

4 kg

hanging from a string is immersed in a liquid of relative density

0.72

. If relative density of silver is

10,

then tension in the string will be: [ take

g = 10 m s^{- 2}

]

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JEE Advanced

IMPORTANT

Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 6 - Fluid Mechanics>Exercises>Q 11

A vessel contains oil (density

= 0.8 g {cm}^{- 3}

) over mercury (density

= 13.6 g {cm}^{- 3}

). A uniform sphere floats with half its volume immersed in mercury and the other half in oil. The density of the material of the sphere (in

g {cm}^{- 3}

) is

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JEE Advanced

IMPORTANT

Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 6 - Fluid Mechanics>Exercises>Q 12

A sealed tank containing a liquid of density

ρ

moves with a horizontal acceleration

a

, as shown in the figure. The difference in pressure between the points

A

and

B

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JEE Advanced

IMPORTANT

Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 6 - Fluid Mechanics>Exercises>Q 13

An empty balloon weighs

W_{1} .

If air equal in weight to

W

is pumped into the balloon. The weight of the balloon becomes

W_{2} .

suppose that the density of air inside and outside the balloon is the same. Then

A block of wood is floating in water in a closed vessel as shown in the figure. The vessel is connected to an air pump. When more air is pushed into the vessel, the block of wood floats with (neglect compressibility of water)

Important Questions on Fluid Mechanics

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