Boyant Force

Now you can calculate Bouyant Force with this app.If you find a weight of body in liquid. Here comes the Archimedes' principle: The buoyant force on a submerged object is equal to the weight of the liquid displaced by the object.Buoyancy is the force that causes objects to float. It is the force exerted on an object that is partly or wholly immersed in a fluid. Buoyancy is caused by the differences in pressure acting on opposite sides of an object immersed in a static fluid. It is also known as the buoyant force.


Buoyancy Force can be calculated with the equation Fb = Vs × D × g, where Fb is the buoyancy force that is acting on the object, Vs is the submerged volume of the object, D is the density of the fluid the object is submerged in, and g is the force of gravity.

One side the body in liquid is affected by gravity force, which is F_g=mg or F_g=\rho Vg. From the other side the body in liquid is affected by buoyant force. Now everything depends on body's density. If it is greater than liquid density, the body will drown, if not - it will be pushed out of liquid until two forces will become equal (The buoyant force become less as body come up out of liquid). The part in the water will be proportional to the liquid/body densities ratio.

The difference between actual weight and apparent weight will be equal to the weight of the liquid which was displaced, and it is volume of body under water multiplied by liquid density.