- #1
hdp12
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Homework Statement
The uniform 5 m-long round wooden rod (ρ = 800 kg/m3 ) is tied to the bottom by a string with length 1 m. Determine the inclination angle θ if the water level is 3.5 m. What if the water level is 7m?
Homework Equations
Fb = ρgV
The Attempt at a Solution
So I'm really struggling with the conceptualization of this one.
I know that
Fg on rod = ρrod⋅Vrod⋅g
FB = ρwater⋅Vdisplaced⋅g
if the depth of the water is 1 m, then there is no y-force on the string. This means that at a water depth of 1 m, the gravitational force is equal to the buoyancy force.
This means that the volume of water displaced is...
( I calculated it out )... 0.02011 m3
What, however, must I do when I begin to increase the water level?