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The velocity of the wind over the surfac...

The velocity of the wind over the surface of the wing of an aeroplane is `80ms^(-1)` and under the wing `60ms^(-1)`. If the area of the wing is `4m^(2)`, the dynamic lift experienced by the wing is [density of air `=1.3kg.m^(-3)`]

A

800 N

B

1000 N

C

4000 N

D

3200 N

Text Solution

Verified by Experts

The correct Answer is:
C
Pressure difference , `Deltap = DeltaKE = 1/2 xx rho (v_1^2-v_2^2)`
or `Delta = 1/2 xx1.0xx(3600-1600)=1000Nm^(-2)`
`rArr F=(Deltap)xxA = 4000 N`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-FRICTION IN SOLID AND LIQUIDS-EXERCISE 1
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  6. Water flows along horizontal pipe whose cross-section is not constant....

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  8. A tank is filled to a height H. The range of water coming out of a hol...

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  9. A container has a small hole at its bottom. Area of cross-section of t...

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  10. The lift of an air plane is based on

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  11. Air is blow through a pipe AB at a rate of 15 L"min"^(-1) . The cross ...

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  12. A large tank is filled with water (density =10^3kgm^(-3)). A small hol...

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  13. The water level on a tank is 5m high. There is a hole of 1 cm^(2) cro...

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  14. A water tank placed on the floor has two small holes, pinched in the v...

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  15. There are two holes O1 "and " O2 in a tank of height H. the water emer...

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  16. A tank is filled to a height H. The range of water coming out of a hol...

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  17. There is a hole at the bottom of a large open vessel. If water is fill...

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  18. Units of coefficient of viscosity are

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  19. As the temperature of water increases, its viscosity

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  20. The rate of flow of liquid in a tube of radius r, length l, whose ends...

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