Home
Class 11
PHYSICS
When a body falls in air, the resistanc...

When a body falls in air, the resistance of air depends to a great extent on the shape of the body, 3 different shapes are gives. Identify the combination of air resistances which truly represents the physical situation. (the cross sectional areas are the same).

A

`1 lt 2 lt 3`

B

`2 lt 3 lt 1`

C

`3 lt 2 lt 1`

D

`3 lt 1 lt 2`

Text Solution

Verified by Experts

The correct Answer is:
C
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

Solve the cross-word. Across 2. A combination of resistances that reduces effective resistance of the circuit. 4. It is the rate of flow of charge. 6. Substance which does not allow current to flow through it. Down: 1. Combination of resistances in. which current flowing through all resistances is same. 3. Ratio of potential difference and current. 5. It is used to protect domestic appliances.

Aves have spindle-shaped body to reduce air resistance during flight.

Choose correct alternative. Two wires of same material and same length are connected in series. The area of cross section of wires is in ratio 3:1 . The resistance of thicker wire is 10 Omega . The total resistance of combination is

Fill in the blanks and complete the following paragraph . (words given: upward, friction,negligible,downward , gravitational , buoyance , very large, electric) When a body falls in air, there are three forces acting on the body : (1) the gravitational force due to the earth, acting........(2) the force of ........ due to air, acting .....(3) the force due to...... with air, acting in the direction oppositeto that of the velocity of the body. Under certain conditions, the force of buoyancy due to air and friction with air can be....... compared to the.......force of the earth. In that case (near the earth's surface) the body falls with almost uniform acceleration (g). Whenever a body moves under the influence of the force of gravity alone, it is said to be falling freely. Strictly speaking, this is true only if the body falls in vaccum.

TARGET PUBLICATION-FRICTION IS SOLIDS AND LIQUIDS -MCQ (COMPETITIVE THINKING)
  1. In stream line flow of liquid, the total energy of liquid constant at ...

    Text Solution

    |

  2. Statement-1 : The stream of water flowing at high speed from a garden ...

    Text Solution

    |

  3. When a body falls in air, the resistance of air depends to a great ex...

    Text Solution

    |

  4. Water is flowing through a tube of non-uniform cross-section ratio of ...

    Text Solution

    |

  5. An ideal fluid flows through a pipe of circular cross section with dia...

    Text Solution

    |

  6. The cylindrical tube of a spray pump has radius R, one end of which ha...

    Text Solution

    |

  7. Water is flowing continuously from a tap having an internal diameter 8...

    Text Solution

    |

  8. Velocity of water in a river is

    Text Solution

    |

  9. The velocity of water in river is 9 km/h of the upper surface . The ri...

    Text Solution

    |

  10. A metal plate of area 500 cm^92) is kept on a horizontal surface with ...

    Text Solution

    |

  11. Spherical balls of radius 'R' are falling in a viscous fluid of viscos...

    Text Solution

    |

  12. A gas bubble of 2 cm diameter rises through a liquid 1.75 gm cm^(-3) w...

    Text Solution

    |

  13. What will be the approximate terminal velocity of a rain drop of diamt...

    Text Solution

    |

  14. A solid ball of volume V is dropped in a viscous liquid. It e...

    Text Solution

    |

  15. A small spherical solid ball is dropped from a great height in a visco...

    Text Solution

    |

  16. A small metal ball of mass m is dropped in a liquid contained in a ves...

    Text Solution

    |

  17. A small sphere of mass m is dropped from a height After it has fallen ...

    Text Solution

    |

  18. The terminal speed of a sphere of gold (density = 19.5 kg m^(-3)) is 0...

    Text Solution

    |

  19. Two solid spheres of same metal but of mass M and 8M fall simultaneous...

    Text Solution

    |

  20. Two spheres of equal masses but radii r(1) and r(2) are allowed to fal...

    Text Solution

    |