Weight
* Definition: The force of gravity acting on an object's mass.
* Direction: Always downwards towards the center of the Earth.
* Formula: Weight = Mass x Acceleration due to gravity (W = mg)
Buoyant Force
* Definition: The upward force exerted by a fluid (liquid or gas) on an object submerged in it.
* Direction: Always upwards, opposite to gravity.
* Cause: The difference in pressure between the bottom and top surfaces of the submerged object.
* Formula: Buoyant force = Density of fluid x Volume of displaced fluid x Acceleration due to gravity (Fb = ρVg)
Key Differences:
* Origin: Weight is due to gravity, while buoyant force is due to fluid pressure.
* Direction: Weight acts downwards, while buoyant force acts upwards.
* Dependence: Weight depends on the object's mass, while buoyant force depends on the fluid's density and the object's volume.
Example:
Imagine a boat floating on water. Its weight is the force pulling it downwards due to gravity. The buoyant force is the upward force exerted by the water on the boat, keeping it afloat.
In summary:
* Weight is the force of gravity acting on an object.
* Buoyant force is the upward force exerted by a fluid on a submerged object.
* They are distinct forces with different origins and directions.
