If a weighted air-filled balloon sinks in deep water be acted on by a continuously decreasing buoyant force.
An object that is fully or partially submerged in a fluid will experience an upward push called the buoyant force. Another name for this upward thrust is upthrust. An object that is partially or completely submerged in a fluid appears to lose weight, or to be lighter, as a result of the buoyant force.
Boundary conditions include the following:
the substance's density
Local gravitational acceleration was displaced by the volume of the fluid.
When an object density is higher than the fluid it is submerged in, it has a tendency to sink. The force can keep an object floating if it is correctly designed (like a boat) or either less dense than the liquid. If the relative density is high.
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