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You see that leaves of trees, banners or...

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

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

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Knowledge Check

  • When the (wind blow). the cradle will rock.

    A
    wind blew
    B
    wind blews
    C
    wind blows
    D
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  • The fronds of the coconut tree make a gentle musical note when the wind blows

    A
    music note
    B
    music sound
    C
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  • They won't commit themselves until they see which way the wind is blowing.

    A
    their till
    B
    no substitution required
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    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 boat is heading towards North with velocity 10ms^(-1) with respect to water which is flowing west to east with speed 6ms^(-1) . Find the direction of flutter of the flag which is hoisted on the boat while the wind is blowing with 16 ms^(-1) west to East.

    A sound source and a listener are both at rest on the earth , but a strong wind is blowing from the source towards the listener. Is there a Doppler effect ? Why or why not ?

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