Question

what is the buoyancy or upthrust?

Answer 1

Buoyancy is the ability to Float in water. It helps to stay in water surface

Answer 2

Buoyancy (/ˈbɔɪənsi, ˈbuːjənsi/) or upthrust, is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid.