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The total weight o a gas filled balloon is 1500N.

  1. Nov 20, 2011 #1

    VICKZZA

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    1. The problem statement, all variables and given/known data

    The total weight o a gas filled balloon is 1500N.THE BALLOON RAISES AT CONSTANT SPEED OF 10m/s.Calculate the resultant force acting on the balloon?

    2. Relevant equations



    3. The attempt at a solution
     
    VICKZZA, Nov 20, 2011
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  3. Nov 20, 2011 #2

    cepheid

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    Re: forces

    If the speed is constant, what does that mean about the acceleration? What does Newton's 2nd Law therefore say about the net force on the object?
     
    cepheid, Nov 20, 2011
  4. Nov 20, 2011 #3

    VICKZZA

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    Re: forces

    as given that the speed is constant ,so there is no acceleration in the ballon.and according to newton 2nd law,force acting on the object is directly proportional to mass of the objectand accelaration,now if we consider this, the net force will be equal to zero.

    but i am still confused,am i right?
     
    VICKZZA, Nov 20, 2011
  5. Nov 20, 2011 #4

    cepheid

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    Yeah that's right. The net force has to be 0. So something has to provide lift to counteract the weight of the balloon. In this case it's the buoyant force that does so (i.e. the balloon floats).
     
    cepheid, Nov 20, 2011
  6. Nov 22, 2011 #5

    VICKZZA

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    Re: forces

    but how much magnitude of buoyant foce will be there when balloon continously arises up?
     
    VICKZZA, Nov 22, 2011
  7. Nov 22, 2011 #6

    SteamKing

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    Re: forces

    Hmm. Balloon weighs 1500 N. Rises with constant velocity. Net Force = 0. What is the buoyant force???? Eureka!, Mr. Archimedes!
     
    SteamKing, Nov 22, 2011
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