As shown in the free body diagram, W is the weight of the WOOD and Fb is the buoyancy force. Thus, Fb is the weight of the WATER displaced by the wood (Archimedes principle). That is why I used the specific gravity of wood for W, and the specific gravity of water for Fb. I hope that helps.
F_b acts a the centroid of the submerged volume (half way down the submerged section of the rod) because it is the displacement of fluid that produces the buoyancy force.
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from 3:40 on, why didn't we use the fluid for W and the wood for Fb?
As shown in the free body diagram, W is the weight of the WOOD and Fb is the buoyancy force. Thus, Fb is the weight of the WATER displaced by the wood (Archimedes principle). That is why I used the specific gravity of wood for W, and the specific gravity of water for Fb. I hope that helps.
@@FluidMatters Thank you!
Very well done sir.
Thanks
omg you are a left-hander too? Thanks for the materials though!!!
Ha ha. A disadvantage for hand-written solutions!
Why u supposed that Fb in this location maybe it is in another location
F_b acts a the centroid of the submerged volume (half way down the submerged section of the rod) because it is the displacement of fluid that produces the buoyancy force.
@@FluidMatters thank you for this illustration
@@FluidMatters hhh