anyone good with fluids ?

[jacobbb]

 

ANY OF THIS CORRECT ?

Hi, I'm trying to understand fluids for past 3 weeks but i doesn't go well. can any one help me ? explain it somehow.

maybe one of the examples i have.
im not asking to for the answer but some kind of formulas of the way to do it ...

A piece of wood of mass 4.8kg is 350 x 600 x 300mm thick. When it is floating water, how much of this thickness h is submerged. Calculate the upthrust on the wood and its apparent weight when floating in water? If the top of the wood and the water surface are at atmospheric pressure, what is the pressure at the bottom of the wood and total upward force generated at the bottom the wood? In order to bring the top just level with the water surface, what additional weight must be buried in the wood?


Thanks

Edited March 10, 2016 by jacobbb

[jacobbb]

any of it correct ?

[studiot]

 

what is the pressure at the bottom of the wood and total upward force generated at the bottom the wood?

 

I recommend you start with this part of the question.

 

Ask yourself, Is the wood in equilibrium?

If so what forces are acting?

Draw a free body diagram.

Does the wood actually loose weight?

[jacobbb]

i have no idea how to do it

[studiot]

 

i have no idea how to do it

 

 

Well you need to understand basic (without friction) forces and equilibrium (statics) before tackling hydrostatics.

 

So where do we start?

 

Do you know what a force is?

 

Do you understand that if a body is static (not moving) it is in equilibrium?

Edited March 11, 2016 by studiot