FLOATING AND SINKING.
Any object in a liquid whether floating or submerged experiences an upward force from the liquid; the force is known as upthrust force.
Upthrust force is also known as buoyant force and is denoted by letter ‘u’.
Floating and Sinking
Archimedes, a Greek scientist carried out first experiments to measure upthrust on an object in liquid in the third century. Archimedes principle states that ‘When a body is wholly or partially immersed in a fluid (liquid/ gas), it experiences an upthrust equal to the weight of the displaced fluid”.