archimedes principle debunked, confusing you :)

[triumph1949]

Originally Posted by raaaid

yes but think this:

a floating stick of density 0.5 what will happen here:

either center of gravity of the stick and level of water doesnt change wetaher the stick floats horizontal or vertical

then how can go from one position to other if no energy was spent?

the latest theories of sentience, in inanimate objects. suggest that due to quantum organisation of matter, into complex systems, at the sub atomic level...
all matter may posses some level of sentience.....the stick will attain the most comfortable and relaxing position, vis a ve, the gravity vectors...the stick is achieving a more relaxing position, and may even have dozed off.

as sticks evolve, they are likely to form viable complex societys..leading eventually to the horror of a world stick war....we have been warned..jim

[retrojet]

...ditto, what they said...

[raaaid]

if this doesnt confuse you as it confuses me well....

im sorry your critic spirit got killed by the educative syustem



FROM WHERE DOES IT GET THE ENERGY TO GO FROM ONE POSITION TO OTHER¡¡¡¡

[bongodriver]

Why have you put the CoG on the waterline?

[raaaid]

because it has density = o.5 so it floats exactly in the midle

thanks for listening litle grasshoper

[bongodriver]

ok genious.....what about the half thats under water.....it will still want to 'float' so it will turn itself until it reaches some sort of stability....i.e. it will lay itself flat

[raaaid]

exactly you got it but water spends energy lowering the level of it or moving the stick cog

but neither happens

an isentropic work in nature?

edit:

so maybe you agree that in both cases the force of the water on the stick aint the same?

[bongodriver]

You obviously don't understand 'displacement', a ship made of steel is much denser than water, it floats because it displaces a certain amount of water which creates a force pushing it 'up'.....same with the stick, if you float it on its end it will push up until the CoG is above the water line (unstable) so it falls on its side and everything is balanced out.....simples

[raaaid]

yeah we agree totally

but you havent answered my question?

is the force of buoyancy equal in both cases?

edit:

not to be concited but remember im 4 subjects away from becoming a nautic engineer, i had to do quite some problems on this

[AndyJWest]

Raaaid with your 50% density example, the CoG of the object is goung to be on the waterline, as you state. The centre of buoyancy however is going to be half way down the immersed section - and as such at different levels in the two examples. The energy for the move comes from the centre of gravity of the displaced water being lower in the case where the object is floating horizontally.