And if no formula, whats the theory?
2006-11-22 08:48:18 · 4 answers · asked by Todd 1 in Science & Mathematics ➔ Physics
I don't know if there is a physical quantity measure of bouyancy, but the idea is displace a volume of the surrounding liquid.
You can easily calculate. For example lets say you have a barrel that can hold 50 gallons and you want to know how many rocks you would have to put in it so that it will sink. You just calculate the total weight of the water that must be displaced (50 gallons - the volumn of the barrel walls is negligible). That is the same weight that the barrel + contents would have to be so that it just becomes level with the water at its lip.
2006-11-22 08:56:03 · answer #1 · answered by Leonardo D 3 · 0⤊ 1⤋
Simple.
Buoyancy = weight of displaced water = volume times density times g
2006-11-22 16:55:17 · answer #2 · answered by Radical One 6 · 0⤊ 0⤋
Definition is itself the formula.
All it says is that the force acting on submerged body is the diff of weight of body and water/liq displaced by it.
=> F = - F(disp) + F(submerged)
This is just the blance of forces with body as sytem.
m x a = (Sigma) F
= force difference = vol x g x density difference (sign shows which direction acc is.
2006-11-22 17:47:51 · answer #3 · answered by ? 3 · 0⤊ 1⤋
WEIGHT OF OBJECT
----------------------------------------------------- < 1 , IT FLOATS
WEIGHT OF WATER DISPLACED
WEIGHT OF OBJECT
----------------------------------------------------- > 1 , IT SINKS
WEIGHT OF WATER DISPLACED
NOT USING WATER AS YOUR LIQUID?
SUBSTITUTE THE NAME OF THE LIQUID YOU ARE USING
FOR THE WORD "WATER"
2006-11-22 16:57:41 · answer #4 · answered by zahbudar 6 · 0⤊ 1⤋