Question

what is buoyant force why an object float or sink in water??​

Answer 1

The principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g.

The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.

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Answer 2

The upward force acting on an object when it is fully immersed in water is called buoyant force.If any object has density less than water it will float but if it has density more than water it will sink
Density = volume*mass