Introduction to Buoyancy: Archimedes' Principle and Its Applications - JSS2 Basic technology Lesson Note

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. This principle explains why objects float or sink in fluids.

Applications:

• Floating and Sinking: Buoyancy explains why objects with a density less than that of the fluid (like boats) float, while denser objects sink. 
• Hydrometers: Devices like hydrometers use buoyancy to measure the density of liquids by how deeply they sink into them.
• Hot Air Balloons: Buoyancy is crucial in hot air balloons, where heated air inside the balloon is less dense than the surrounding air, causing the balloon to rise.