What is Buoyancy?

Buoyancy is the upward force exerted by a fluid (liquid or gas) on an object immersed in it. This force opposes the weight of the object and is responsible for making objects float or sink.

Principle of Buoyancy (Archimedes' Principle)

Archimedes’ Principle states that: "An object submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid it displaces."

Key Factors Affecting Buoyancy:

Density of the Object vs. Density of the Fluid: If the object's density is less than the fluid’s density, it floats. If the object's density is greater than the fluid’s density, it sinks. If the object's density is equal to the fluid’s density, it remains suspended in the fluid. Volume of Displaced Fluid: A larger volume of displaced fluid results in a greater buoyant force. Gravitational Acceleration: Buoyant force depends on gravity, as it determines the weight of the displaced fluid.

Examples of Buoyancy:

A ship floating on water despite being heavy. A helium balloon rising in the air. A person floating in a swimming pool.