Question

Define upthrust

Answer 1

Upthrust, often referred to as "buoyant force," is the upward force exerted by a fluid on an object that is submerged or partially submerged in it. This force counteracts the weight of the object and is a result of the pressure difference between the upper and lower surfaces of the object due to the fluid's weight. The principle of upthrust is explained by Archimedes' principle, which states that the upward buoyant force on an object in a fluid is equal to the weight of the fluid that the object displaces. This principle helps in understanding why objects float or sink in fluids: an object will float if the buoyant force is equal to its weight and will sink if the weight is greater than the buoyant force.