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Mechanical Prop...

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  • Question 1
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    Applications of Bernoulli's theorem can be seen in the

  • Question 2
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    A 50 kg girl wearing heel shoes balances on a single heel. The heel is circular with a diameter 1 cm. The pressure exerted by the heel on the horizontal floor is then (Take g = 10 m s$$^{-2}$$)

  • Question 3
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    In a wind tunnel experiment, the pressures on the upper and lower surfaces of the wings are 0.90 x$$10^5$$ Pa and 0.91 x 10$$^5$$ Pa respectively. If the area of the wing is 40 m$$^2$$ the net lifting force on the wing is

  • Question 4
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    Hydraulic brakes are based on

  • Question 5
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    A steam of water flowing horizontally with a speed of $$25 ms^{-1}$$ gushes out of a tube of cross-sectional area $$10^{-3}m^2$$, and hits at a vertical wall nearby. What is the force exerted on the wall by the impact of water?

  • Question 6
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    Spherical balls of radius R are falling in a viscous fluid of velocity v. The retarding viscous force acting on the spherical ball is

  • Question 7
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    At what velocity does water emerge from an orifice in a tank in which gauge pressure is 

    $$3\times 10^5N m^{-2}$$ before the flow starts? (Take the density of water= 1000 kg m$$^{-3}$$.)

  • Question 8
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    Which of the following device is used to measure the rate of flow of liquid through a pipe?

  • Question 9
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    Two capillaries of same length and radii in the ratio 1: 2 are.connected in series. A liquid flows through them in streamlined condition. If the pressure across the two extreme ends of the combination is 1 m of water, the pressure difference across first capillary is

  • Question 10
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    Directions For Questions

    Fluids at rest exert a normal force to the walls of the container or to the surface of the body immersed in the fluid. The pressure exerted by this force at a point inside the liquid is the sum of atmospheric pressure and a factor which depends on the density of the liquid, the acceleration due to gravity and the height of the liquid above that point. The upthrust acting on a body immersed in a stationary liquid is the net force acting on the body in the upward direction. A number of phenomenon of liquids in motion can be explain by Bernoullis theorem which relates the pressure, flow speed and height for flow of an ideal incompressible fluid.
    .A container of large uniform cross-sectional area $$A$$ resting on a horizontal surface holds two immiscible, non-viscous and incompressible liquids of densities $$d$$ and $$2d$$, each of height $$H/2$$ as shown in the figure. The lower density liquid is open to the atmosphere having pressure $${P}_{0}$$.
    Situation II:
     The cylinder is removed and the original arrangement is restored. A tiny hole of area $$s (s\ll A)$$ is punched on the vertical side of the container at a height $$h (h<H/2)$$.

    ...view full instructions

    The horizontal distance $$x$$ travelled by the liquid initially is 

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