Class 11PhysicsMechanical Properties of FluidsBernoulli's Theorem and Applications of Bernoulli's Theory
EasyThe weight of an aeroplane flying in the air is balanced by:
- AVertical component of the thrust created by air currents striking the lower surface of the wings
- BForce due to reaction of gases ejected by the revolving propeller
- CUpthrust of the air which will be equal to the weight of the air having the same volume as the plane
- DForce due to the pressure difference between the upper and lower surfaces of the wings created by different air speeds on the surfaces
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Similar Questions
Bernoulli's principle does not explain which of the following phenomena?
Easy
View SolutionThe speeds of air above and below the wing of an airplane are $120\, m/s$ and $90\, m/s$,respectively. The density of air is $1.3\, kg/m^3$. If the wing has a length of $10\, m$ and a width of $2\, m$,the pressure difference between the top and bottom of the wing is ......... $Pascal$.
Medium
View SolutionWater flows steadily through a horizontal pipe of variable cross-section. If the pressure of water is $P$ at a point where flow speed is $v$,the pressure at another point where the flow speed is $2v$,is (Take density of water as $\rho$)
Medium
View Solution$A$ fully loaded Boeing aircraft has a mass of $5.4 \times 10^5 \, kg$. Its total wing area is $500 \, m^2$. It is in level flight with a speed of $1080 \, km/h$. If the density of air $\rho$ is $1.2 \, kg/m^3$,the fractional increase in the speed of the air on the upper surface of the wing relative to the lower surface in percentage will be $(g = 10 \, m/s^2)$.
DifficultJEE MAIN 2023
View SolutionWater from a tap emerges vertically downwards with an initial velocity of $4 \,m/s$. The cross-sectional area of the tap is $A$. The flow is steady and the pressure is constant throughout the stream of water. The distance $h$ vertically below the tap,where the cross-sectional area of the stream becomes $\frac{2}{3} A$,is (take $g = 10 \,m/s^2$): (in $\,m$)
DifficultAP EAMCET 2010
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