What happens to an object's buoyancy if you add more weight to it?

When you add more weight to an object, its buoyancy decreases because buoyancy is the upward force exerted by a fluid that opposes the weight of an object immersed in it. The fundamental principle behind this is Archimedes' principle, which states that the buoyant force on an object is equal to the weight of the fluid displaced by the object.

As more weight is added to the object, the overall density of the object increases. If the density of the object exceeds the density of the fluid, the buoyant force is no longer sufficient to keep the object afloat, causing it to sink or submerge deeper. Therefore, adding more weight effectively reduces the chance of the object floating, as it overcomes the buoyant force acting on it.

In this context, the other provided options do not accurately describe the relationship between added weight and buoyancy. The notion that buoyancy increases with added weight contradicts the basic principles of fluid dynamics, as does the idea that buoyancy would remain the same or that the object would automatically float regardless of the weight added. Thus, understanding the interaction between weight and buoyancy is crucial for divers and those studying underwater physics.