Home
Class 11
PHYSICS
Two immiscible liquids of densities rho ...

Two immiscible liquids of densities `rho` and `2rho` and thickness (heights) `h` and `2h`, respectively, push a vertical plate. Find the total side thrust given by the liquids on the vertical plate.

Text Solution

Verified by Experts

The correct Answer is:
`F=13/2rhogh^(2)b`

Let the hydrostatic forces acting on the rectangular pathes of areas `A_(1)` and `A_(2)` of the gate be `F_(1)` and `F_(2)`. Then the total hydrostatic force on the gate is
`F=F_(1)+F_(2)`
where `F_(1)=P_(av_(1))A_(1)` and `F_(2)=P_(av_(2)) A_(2). P_(av_(1))` and `P_(av_(2))` and `P_(av_(2))` are the average pressures on areas `A_(1)` and `A_(2)`, respectively.
`F=P_(av_(1))A_(1)+P_(av_(2))A_(2)`

Substituting `P_(av1)=(P_(A)+P_(B))//2, A_(1)=bh_(1)=bh, P_(av2)=(P_(B)+P_(C)).2,A_(2)=bh_(2)=b(2h),` we have
`F=((P_(A)+P_(B)))/2bh+((P_(B)+P_(C)))/2 2bh`
Substituting `P_(A)=0, P_(B)=rhogh` and `P_(C)=(rho_(1)h_(1)+rho_(2)h_(2))g=[rhoh+(2rho)(2h)]=5rhogh,` we have
`F=3/2rhogh^(2)b`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • FLUID MECHANICS

    CENGAGE PHYSICS ENGLISH|Exercise Single Correct|95 Videos
  • FLUID MECHANICS

    CENGAGE PHYSICS ENGLISH|Exercise Multipe Correct|15 Videos
  • FLUID MECHANICS

    CENGAGE PHYSICS ENGLISH|Exercise Exercise 4.4|10 Videos
  • DIMENSIONS & MEASUREMENT

    CENGAGE PHYSICS ENGLISH|Exercise Integer|2 Videos
  • GRAVITATION

    CENGAGE PHYSICS ENGLISH|Exercise INTEGER_TYPE|1 Videos

Similar Questions

Explore conceptually related problems

A thin triangular glass tube containing immiscible liquids A, B, C of densities rho, 2rho, 3rho is at rest in vertical plane. Find x.

The pressure inside a liquid of density rho at a depth h is :

Two immiscible liquid of densities rho and 3rho are put in a container. The height of each liquid is h. A solid cylinder of length L and density d is put in this container. The cylinder floats completely inside liquids with its axis vertical and length L/3 in the denser liquid. The density d is equal to

In a U-tube, two immiscible liquids of density rho _ 1 and rho _ 2 are arranged as shown in figure. The right part of the tube is closed at the top and some air is entrapped above liquid of density rho _2 . The gauge pressure of this air is :

A vertical pole of length l , density rho , area of cross section A floats in two immiscible liquids of densities rho_(1) and rho_(2) . In equuilibrium possition the bottom end is at the interface of the liquids. When the cylinder is displaced vertically, find the time period of oscillation.

Equal volume of two immiscible liquids of densities rho and 2rho are filled in a vessel as shown in the figure. Two small holes are punched at depths h//2 and 3h//2 from the surface of lighter liquid. If v_(1) and v_(2) are the velocities of efflux at these two holes, then v_(1)//v_(2) is

Equal volume of two immiscible liquids of densities rho and 2rho are filled in a vessel as shown in the figure. Two small holes are punched at depths h//2 and 3h//2 from the surface of lighter liquid. If v_(1) and v_(2) are the velocities of efflux at these two holes, then v_(1)//v_(2) is

Equal volumes of two immiscible liquids of densities rho and 2 rho are filled in a vessel as shown in figure. Two small holes are punched at depth h/2 and 3h/2 from the surface of lighter liquid. If v_(1) and v_(2) are the velocities of efflux at these two holes then ((v_(2))/(v_(1)))^(2) is

In a cylindrical vessel containing liquid of density rho there are two holes in the side walls at heights of h_(1) and h_(2) respectively such that the range of efflux at the bottom of the vessel is same. The height of a hole for which the range of efflux would be maximum, will be

Equal volumes of two immiscible liquids of densities rho and 3rho are filled in a big vessel. Two small holes are punched at depth h//3 and 4h//3 from upper surface of lighter liquid. If v_(1) and v_(2) are velocities of efflux at these two holes, then v_(1)//v_(2) is