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Balloon acceleration

  1. Mar 1, 2016 #1
    1. The problem statement, all variables and given/known data
    The mass of an empty balloon is 0.41 kg it got inflated with 0.0938 kg of helium which ressulted in his volume being 0.524 m^3 after being inflated then left to ascend considering the air's density is constant and is 1.30 kg/m^3 what is the acceleration of the balloon (dont consider air resistance)



    2. Relevant equations
    Fb=density*volume*g
    Fg=mg
    Fnet
    a=Fnet/m


    3. The attempt at a solution
    Fb=1.30*0.524*9.81=6.68257N
    Fg=(0.41+0.0938)9.81=4.94N
    6.68-4.94=1.74N
    1.74/(0.41+0.0938)=3.45 m/s^2
    Tye answer sheet says its 16.4???
     
  2. jcsd
  3. Mar 1, 2016 #2

    SteamKing

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    The answer key is wrong.
     
  4. Mar 1, 2016 #3
    Am I right?
     
  5. Mar 1, 2016 #4
    Yes.
     
  6. Mar 1, 2016 #5
    Omg thank you that rarely happens lol
     
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