Archimedes’ Principle states that when an object is partially or fully immersed in a fluid, it experiences an upward buoyant force equal to the weight of the fluid displaced by the object. This principle explains why objects appear to weigh less when submerged in a fluid compared to when they are in air. Mathematically, Archimedes’ Principle can be expressed as:
Where:
- is the buoyant force acting on the object (in Newtons, N),
- is the density of the fluid (in kilograms per cubic meter, kg/m³),
- is the volume of fluid displaced by the submerged object (in cubic meters, m³), and
- is the acceleration due to gravity (in meters per second squared, m/s²).