Buoyancy

Buoyancy is the upward force that water or any fluid exerts on an object immersed in it. This force occurs because of pressure differences: as you go deeper in a fluid, pressure increases. If the weight of the object is less than the fluid it displaces, the object will float. If it's heavier, it will sink. Buoyancy is why boats float on water and why we feel lighter when swimming. It’s a key principle in physics that explains how objects interact with fluids, influenced by factors such as density and gravitational force.