Home
Class 11
PHYSICS
Flags flutter in breeze. Why?...

Flags flutter in breeze. Why?

Text Solution

Verified by Experts

When air is breezing, the air layers are moving with unequal velocity on the two face of cotton flag. Unequal velocity on the two faces of cotton flag. Due to it, there will be unequal pressure on the two faces of the flag ac cording to Bernoulli's theorem, which results fluttering of flag.
Promotional Banner

Topper's Solved these Questions

  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Long Answer questions|33 Videos

  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Solved Examples|159 Videos

  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Very short answer questions|163 Videos

  • PHYSICAL WORLD AND MEASUREMENT

    PRADEEP|Exercise Competiton Focus Jee Medical Entrance|18 Videos

  • RAY OPTICS

    PRADEEP|Exercise Problem For Practice(a)|25 Videos

Similar Questions

Explore conceptually related problems

You see that leaves of trees, banners or flags flutter when the wind is blowing. Why is it so?

Why does a flag flutter, when strong winds are blowing on a certain day?

When you are standstill holding a flag, the flag flutters in the direction of wind. When you start running the direction of fluttering of the flag changes to the direction of the wind relative to you. In all case a flag flutters in the direction of the wind relative to the flag. Holding a flag, when you run at 8 m/s due cast, the flag flutters in the north and when you run at 2m/s due south, the flag flutters in the northeast. If the wind velocity is unifoem and remain constant, find the wind velocity.

When you are standstill holding a flag, the flag flutters in the direction of wind. When you start running the direction of fluttering of the flag changes to the direction of the wind relative to you. In all case a flag flutters in the direction of the wind relative to the flag. When you are standstill holding a flag the flag flutters in the north and when you run at 8 m/s due cast. theflag flutters in direction 37^(@) north of west. Find the wind velocity.

When you are standstill holding a flag, the flag flutters in the direction of wind. When you start running the direction of fluttering of the flag changes to the direction of the wind relative to you. In all case a flag flutters in the direction of the wind relative to the flag. Winds is blowing uniformly due north everywhere with velocity 12 m/s. A car mounted with a flag starts running towards cast. after 9s from starts the flag flutters in 53^(@) north of west and after 16 s from the start the flag flutters in 37^(@) north of west. (a) Find velocity of the car 9 s after it starts. (b) Find velocity of the car 16 s after it starts. (c) If the car maintains uniform acceleration, find acceleration of the car.

A flag mounted on a flag post near the sea coast flutters in the direction of sea. At what time of the day does this happen – at midnight or in the afternoon?

At a harbour, a boat is standing and wind is blowing at a speed of sqrt(2)m//sec. due to which , the flag on the boat flutters along north - east. Now the boat enters in to river, which is flowing with a velocity of 2m//sec . Due north. The boat starts with zero velocity relative to the river and its constant acceleration relative to the river is 0.2m//sec^(2) due east. In which direction will the flag flutter at 10 seconds ?

Distinguish between land breeze and sea breeze.

Distinguish between land breeze and sea breeze.

PRADEEP-PROPERTIES OF BULK MATTER-Short Answer Questions
  1. The cylindrical tube of a spray pump has radius R, one end of which ha...

    Text Solution

    |

  2. Distinguish between streamline motion and turbulent motion.

    Text Solution

    |

  3. Flags flutter in breeze. Why?

    Text Solution

    |

  4. It is advised not to stand near a running train. Why?

    Text Solution

    |

  5. Why two boats moving in parallel directions close to each other get at...

    Text Solution

    |

  6. An aeroplane runs for some distance on the run way before taking off. ...

    Text Solution

    |

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

    Text Solution

    |

  8. In a test experiement on a model aeroplane in a wind tunnel, the flow...

    Text Solution

    |

  9. The stream of water flowing at high speed from a garden hose pipe tend...

    Text Solution

    |

  10. There are two holes, each of cross-sectional area a, on the opposite s...

    Text Solution

    |

  11. Explain viscosity of a liquid. Discuss its cause.

    Text Solution

    |

  12. Explain coeffecient of viscosity , its units and give its dimensional ...

    Text Solution

    |

  13. State Poiseuille's formula. Derive it with the help of dimensional ana...

    Text Solution

    |

  14. State and Establish Stokes' law.

    Text Solution

    |

  15. What do you understand by terminal velocity. Find the relation for it?

    Text Solution

    |

  16. Mention some particle uses of the knowledge of viscosity.

    Text Solution

    |

  17. What do you understand by critical velocity?

    Text Solution

    |

  18. What do you understand by Reynold number? Give its physical significa...

    Text Solution

    |

  19. What is venturimeter ?

    Text Solution

    |

  20. State and explain Torricelli's theorem.

    Text Solution

    |