How Do You Calculate the Acceleration of This Inflated Balloon?

[vinamas]

Homework Statement

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)[/B]

Homework Equations

Fb=density*volume*g
Fg=mg
Fnet
a=Fnet/m

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?[/B]

 

[SteamKing]

The answer key is wrong.

 

[vinamas]

The answer key is wrong.

The answer key is wrong.

Am I right?

 

[Chestermiller]

Am I right?

Yes.

 

[vinamas]

Yes.

Omg thank you that rarely happens lol