... accelerated upward in the fluid.
If the buoyant force is greater than the weight of an object than the object will accelerate (assuming there are no other forces acting on the object)
If the weight of an object is greater than its buoyant force, then it will not float - it will sink.
The object sinks.
The buoyant force is what causes and object to float. If the buoyant force is less than the object weight, it sinks. If the buoyant force is greater than the objects weight, it rises to the top. If it is equal, the object will float in the middle, neither rising or falling.
If the object is floating, then the buoyant force is equal to the object's weight.
If the object is floating, then the buoyant force is equal to the object's weight.
In that case, such an object will float.
When the weight of any object surrounded by fluid is greater than the buoyant force on it, it sinks. (The buoyant force is just the weight of the fluid that would be in that space if the submerged object were not there.)
When an object is floating in equilibrium, the buoyant force equals the weight of the object. (The buoyant force is equal to the weight of the displaced fluid)
The buoyant force on an object is equal to the weight of the water it displaces. This is called Archimedes' principle, which states that "The buoyant force on an object is equal to the weight of the fluid displaced by the object."
The buoyant force on a ship (or any object in a liquid) is equal to the weight of the water the displaces. If this force is greater than the weight of the ship, it will stay afloat.
It is not the weight of the immersed object but the volume of the object would affect the buoyant force on the immersed object because the buoyant force is nothing but the weight of the displaced liquid whose volume is equal to that of the immersed object.