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If you just set the object in the water, the buoyant force never becomes greater than the object's weight.
It sinks and sinks, displacing more and more water, building up more and more buoyant force, until the
buoyant force is equal to its weight. At that point, the net force on it is zero, it stops sinking, and it stays
right there (floating).
The only way you can produce a buoyant force greater than its weight is to force it further down and hold it there.
Since the buoyant force is greater than its weight, as soon as you let go, the net force on it is up, and it'll rise,
partly out of the water until the buoyant force drops to equal its weight, and again ... it'll stay right there.
So the answer to the question is: An object can't stay indefinitely in a position where the buoyant force
is greater than its weight. If that happens, then it lifts some of itself out of the water, reducing the
buoyant force, until the buoyant force is again just equal to its weight.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoBouyancy is the force that keeps things afloat. It is present whenever an object in floating on or submersed in a fluid. In liquids it is an important force, and in gasses it is usually negligible.
Weather something floats or sinks essentially comes down to weather the bouyancy force is greater of the object's weight is greater. The bouyancy force is equal to the weight of the fluid that the object displaces. This means that if the object is more dense than the fluid, than the bouyancy force will be less than the object's weight even when the object it totally submersed in the fluid, and so it will sink. If the object is less dense than the fluid, then the bouyancy force will be equal to the object's weight when only part of the object is displacing the fluid, and so it will float. If you push a floating object down under the water, now the bouyancy force is greater than the weight, and so the net force will try to return the object to the surface.
So in the end, weather an object will float or sink depends on weather the fluid or the object is more dense.
Wiki User
∙ 7y agoThe rule is that an object will float if it has less density than the fluid in which it is placed.In terms of buoyant force and gravity, it will sink if the gravitational force is greater than the buoyant force.
Wiki User
∙ 11y agoIf its sinking, then the buoyant force is less than the weight.
Wiki User
∙ 14y agoit will float
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The upward force of a liquid or air on an object that helps it float?
The force that makes things float is called buoyancy.
An object less dense than water will in water?
The "average" density of the object must be less than that of the water displaced.
Tendency of an object to float is called?
DensityThe lower the density in the liquid or air the more it will float
Comparing the of an object with that of a liquid will tell you whether or not the object will float in that liquid?
density
How does weight affect buoyancy?
It depends on the two materials involved. The underlying question here is what affect does temperature have on density -- because it is the relative density of an object that will determine whether it sinks or float in a liquid. Most often, the density of a material goes down with increasing temperature (in other words buoyancy goes up with temperature) -- but that is not always the case. Water is most dense at 4°C for instance, which is why ice cubes float. For any common material, it is trivial to find a graph of density versus temperature (try google.com for instance). The lower the density, the more buoyant it will be (it won't be buoyant at all in water if the density is above 1 gram/cm3 though).
What most influences whether or not an object will float?
An object's density influences its buoyancy, thus determining whether or not an object will float
What force determine whether or not an object will float?
i think buoyancy
What is buoyancy and how does it affect a blimp?
buoyancy is a measure of how well an object will float in a given medium, eg: a boat in water. similarly for a blimp, the blimp is the object, the air is the medium. if it is not buoyant enough, it will not 'float' in the air, aka fly
What The tendency of an object to float is called?
buoyancy
Does mass affect whether or not an object will float?
no and mass is air
What does non-buoyancy mean?
Non-buoyancy means that an object does not float (I think).
Why do rocks sink and rubber balls float in a swimming pool?
Whether an object sinks or floats depends on the objects buyoncy. If an object has a higher buoyancy then water it will generally sink, and less it will float.
The upward force of a liquid or air on an object that helps it float?
The force that makes things float is called buoyancy.
What force makes an object float on water?
Buoyancy.
What is the tendency of a solid object to float in a fluid?
"buoyancy"
How does an objects size and shape affect buoyancy?
Well, buoyancy is capacity to float in liquid. So the object needs to have air to make it float an example for an boat the Titanic for example was really heavy it was made out of steel so it had air in the bottom to make the ship float.
What two forces affect you when you float?
Gravity and buoyancy.
