Home
Class 11
PHYSICS
The speed of the wind passing over the w...

The speed of the wind passing over the wings of a small aeroplane is 70 m/s and below the wing is 60 m/s. If the mass of the plane is 1000 kg and the area of wing is `14 m^(2),` then what will be ther net vertical force on the aeroplane ?
? (Density of air `=1.2 kg//m^(3) and g=10 m//s^(2))`

A

620 N upward

B

920 N upward

C

620 N downward

D

920 N downward

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • FRICTION IS SOLIDS AND LIQUIDS

    TARGET PUBLICATION|Exercise MCQ (EVALUATION TEST)|21 Videos

  • FRICTION IS SOLIDS AND LIQUIDS

    TARGET PUBLICATION|Exercise MCQ (CRITICAL THINKING)|66 Videos

  • FORCE

    TARGET PUBLICATION|Exercise Evaluation Test|18 Videos

  • Gravitation

    TARGET PUBLICATION|Exercise Exercise|273 Videos

Similar Questions

Explore conceptually related problems

A plane is in level flight at constant speed and each of its two wings has an area of 20m^(2). If the speed of the air is 180 km/h over the lower wing and 216 km/h over the upper wing surface, determine the plane's mass. (Take air density to be 1 kg m ^(-3) and g= 10m//s ^(2)).

The speed of a transverse wave along a uniform metal wire, when it is under a tension of 1000 g wt is 68m/s .If the density of metal is 7900 kg/m^3 , find the area of cross section of the wire.

Find the pressure 200 m below the surface of the ocean if pressure on the free surface of liquid is one atmosphere. (Density of sea water =1060kg//m^3 ) g = 9.8m//s^2

A swimmer is swimming in a swimming pool at 6 m below the surface of the water. Calculate the pressure on the swimmer due to water above. (Density of water = 1000 kg/m^3, g = 9.8m/s^2)

Find R.M.S. velocity of H_2 molecules at N.T.P. (density of H_2 = 0.09 kg//m^3, P= 10^5 N//m^2 )

Solve the following example : The mass of a tile is 500 g. If the density of the tile is 2.5 g//cm^3 . What will be the weight of the tile when it is completely immersed in water ? (g = 9.8 m//s^2, rho (water) = 1000 kg//m^3)

A car of mass 1000 kg moves on a circular path with constant speed 16 m//s . If it is turned by 90^@ after travelling 628 m on the road, then the centripetal force acting on the car will be

Air is blowing across the horizontal wings of an aeroplane in such a way that its speeds below and above the wings are 80 m/s and 120 m/s respectively. If the density of air is 1.2 kg/m^3 then the pressure difference between the lower and the upper sides of the wings will be

The terminal velocity of a water drop of radius 0.01 mm falling through air is 1.12 cm/s. If the density of air is neglected, the coefficient of viscosity of air is [density of water =10^(3) kg//m^(3), g=9.8m//s^(2)]

TARGET PUBLICATION-FRICTION IS SOLIDS AND LIQUIDS -MCQ (COMPETITIVE THINKING)
  1. A plank with a box on it at one end is gradully raised about the other...

    Text Solution

    |

  2. There is a small hole at the bottom of tank filled with water. If tota...

    Text Solution

    |

  3. The working of venturimeter is based on

    Text Solution

    |

  4. In dimension of circal velocity v(0) liquid following through a take a...

    Text Solution

    |

  5. The upper half of an inclined plane with inclination phi is perfectly ...

    Text Solution

    |

  6. A bullet of mass 50 g moving horizontally with a velocity 210 ms^(-1) ...

    Text Solution

    |

  7. A body of weight 64 N is pushed with just enough force to start it mov...

    Text Solution

    |

  8. The three vessels shown in figure have same base area. Equal volumes o...

    Text Solution

    |

  9. A fireman of mass 60 kg slides down a pole. As shown in figure. He is ...

    Text Solution

    |

  10. A tank is filled with water up to a height H. Water is allowed to come...

    Text Solution

    |

  11. A point particle of mass m, moves long the uniformly rough track PQR a...

    Text Solution

    |

  12. A 60 kg weight is dragged on a horizontal surface by a rope upto 2 met...

    Text Solution

    |

  13. When a body is moving on a surface, the force of friction is called

    Text Solution

    |

  14. The speed of the wind passing over the wings of a small aeroplane is 7...

    Text Solution

    |

  15. A rectangular vessel when full of water takes 10 minutes to be emptied...

    Text Solution

    |

  16. A vessel completely filled with water has holes 'A' and 'B' at depths ...

    Text Solution

    |

  17. A large open tank has two holes in the wall. One is a square hole of s...

    Text Solution

    |

  18. A body of mass 2 kg is being dragged with uniform velocity of 2 m / s ...

    Text Solution

    |

  19. A spherical solild of volume V is made of a material of density rho(1)...

    Text Solution

    |

  20. The heart of a man pumps 5 liters of blood through the arteries per mi...

    Text Solution

    |