Home
Class 11
PHYSICS
A metel plate 100 sq cm in area rests on...

A metel plate 100 sq cm in area rests on a 2-mm layer of castor oil, whose coefficient of viscosity is `1.55` SI units. Calculate the horizontal force required to move the plate with a speed of 3 cm per second.
[Hint: `F=-etaA(dv)/(dx)."Here"(dv)/(dx)=(3xx10^(-2)ms^(-1))/(2xx10^(-3))=15s^(-1)`.]

Text Solution

Verified by Experts

The correct Answer is:
`0.2325N`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

A circular metal plate of radius 4 cm rests on a layer of castor oil 2 mm thick, whose coefficient of viscosity is 16.5 Nsm^(-2). Calculate the horizontal force required to move the plate with a speed of 3 cm/s.

A metal plate 5cmxx5cm rests on layer of castor oil 1mm thick whose coefficient of viscosity is 1.55 Nsm^(-1) . Find the horizontal force required to move the plate with a speed of 2 cm^(-1) .

A circular metal plate of radius 6 cm rests on a layer of caster oil 1.5 mm thick, whose coefficient of viscosity is 15.5 poise. Find the horizontal force (in kg wt) required to move the plate with a speed of 60 ms^(-1) .

A metal plate 0.4 m^(2) inarea is lying on a liquid layer of thickness 10^(-3) m and coefficient of viscosity 140 poise . Calculate the horizontal force needed to move the plate with a speed of 0.040 m^(2)

A metal plate of area 0.02m^(2) is lying on a liquid layer of thickness 10^(-3) m and coeffcient of viscosity 120 poise .Calcualate the horizontal force requirred to move the plate with a speed of 0.025ms^(-1)

A plate of metal 10 cm sq. rests on a layer of caster oil 2mm thick whose coefficient of viscosity is 15.5 dyn e cm^(-2)s . Calculate the horizontal force required to move the plate with a speed of 3 cm s^(-1) . Also calculate strain rate and shearing strees.

A circular metal plate of radius 5 cm, rests on a layer of castor oil 2mm thick, whose coeffeicient of viscosity os 15.5 dyn e cm^(-2)s . Calculate the horizontal force required to move the plate with a speed of 5 cms^(-1) . Also calculate strain rate and shearing stress.

A plate of area 100 cm^(2) is placed on the upper surface of castor oil, 2mm thick. Taking the coefficient of viscosity to be 15.5 poise, calculate the horizontal force neccesary to move the plate with a velocity 3cm^(-1) .

A metallic plate having area 0.03 m ""^(2) is lying on a layer (10^(-2)" m thick") of liquid having coefficient of viscosity as 100 poise. What will be the horizontal force required to move the plate with a speed of 0.03 ms ""^(-1)?

A metal plate of area 10^(-3)m^(2) is placed on a liquid layer of thickness 0.8mm . The coefficient of viscosity of that liquid is 24 poise .Then the horizontal force required to move the plate with a velocity of 1cms^(-1) .

NN GHOSH-HYDRODYNAMICS-EXERCISES
  1. TheThe velocity of flow of water in the main water supply pipe is 1.0m...

    Text Solution

    |

  2. Calculate the velocity of efflux of kerosene form a tank in which the ...

    Text Solution

    |

  3. The reading of pressure meter attached with a closed pipe is 3.5 xx 10...

    Text Solution

    |

  4. A metel plate 100 sq cm in area rests on a 2-mm layer of castor oil, w...

    Text Solution

    |

  5. Calculate the critical velocity of water through a narrow tube of radi...

    Text Solution

    |

  6. Water is conveyed through a tube 8 cm in diameter and 4 km in length a...

    Text Solution

    |

  7. Find the terminal velocity acquired by a steel ball of diameter 3.2 mm...

    Text Solution

    |

  8. A steel ball-bearing of diameter 3 mm falls through glycerine and cove...

    Text Solution

    |

  9. An air bubble of radius 1 cm is found to rise in a cylindrical vessel ...

    Text Solution

    |

  10. Calculate the velocity with which rain drops reach us if the diameter ...

    Text Solution

    |

  11. A bubble of air of 2 mm diameter rises in a liquid of viscosity 0.075 ...

    Text Solution

    |

  12. A vessel fitted with a horizontal capillary tube near its bottom is al...

    Text Solution

    |

  13. A vessel of cross-section 20xx10^(-4) square metres has a capillary tu...

    Text Solution

    |

  14. A tank is filled with water to a height H. A hole is punched in the wa...

    Text Solution

    |

  15. In a horizontal oil pipeline of constant cross-sectional area the pres...

    Text Solution

    |

  16. A cylindrical vessel of hieght h and base area S is filled with water....

    Text Solution

    |

  17. A horizontally oriented tube AB of length l rotates with a constant an...

    Text Solution

    |

  18. A horizontal cylindrical vessel with a small orifice of area s is firs...

    Text Solution

    |

  19. Water flows out of a big tank along a horizontal tube of length l and ...

    Text Solution

    |