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bolivartech
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Homework Statement
A helium filled balloon is tied to a 2.00-m-long, 0.050 0-kg uniform string. The balloon is spherical with a radius of 0.400 m. When released, it lifts a length h of string and then remains in equilibrium as shown in figure P14.51. Determine the value of h. The envelope of the balloon has a mass of 0.250 kg.
Homework Equations
Code:
ρ= m⁄v
v= 4/3 pi r^3
B=ρ[SUB]air[/SUB] * g * V[SUB]obj[/SUB]
The Attempt at a Solution
Code:
B=(1.29 kg⁄m^3 )(9.8 m⁄s^2 )(.26808 m^3)
B=3.39 N
m_he=.047986
F_g=Mg
F_g=(.347986 kg)(9.8 m⁄s^2 )
F_g=3.41 N
This is something the prof. said to start with, I'm not sure how this helps aside from proving it has pretty much reached equillibrium. I really just don't know what formula that involves height will work.