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A cubical block of side a and density rh...


A cubical block of side `a` and density `rho` slides over a fixed inclined plane with constant velocity `v`. There is a thin film of viscous fluid of thickness `t` between the plane and the block. Then the coefficient of viscosity of the thin film will be: (Acceleration due to gravity is g)

A

`(rhoa"gt"sintheta)/(v)`

B

`(rho"gt"costheta)/(v)`

C

`(v)/(rho"gt"sintheta)`

D

none of these

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The correct Answer is:
A
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ALLEN -ELASTICITY, SURFACE TENSION AND FLUID MECHANICS-Exercise 2 (One or more than one correct answer)
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  4. A homogeneous solid cylinder of length L(LltH/2), cross-sectional area...

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  5. A mercury manometer is connected as shown in the figure. The differenc...

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  7. A small ball is left in a viscous liquid form very much height correct...

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  8. A cubical block of side a and density rho slides over a fixed inclined...

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  9. A space 2.5cm wide between two large plane surfaces is filled with oil...

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  10. A large drop of oil whose density is less than that of water, floats ...

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  11. If the terminal speed of a sphere of gold (density =19.5kg//m^3) is 0....

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  12. A spherical ball is dropped in a long column of viscous liquid. Which ...

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  13. A small sphere of mass m is dropped from a aheight After it has fallen...

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  14. The wires A and B shown in Fig. are made of the same material and have...

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  15. When a capillary tube is dipped in a liquid, the liquid rises to a hei...

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  16. A massless conical flask filled with a liquid is kepth on t a table in...

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  17. The vessel shown in the figure has a two sections of areas of cross-se...

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  18. A liquid flows through a horizontal tube. The velocities of the liquid...

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  19. A vertical U-tube contains a liquid. The total length of the liquid co...

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  20. A cup filled with water has a hole in the side, through which the liqu...

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