Question

what is buoyant force. why buoyant force acts perpendicular to earth surface. explain?

Answer 1

buoyant force is the force experienced by a body when it is immersed in a fluid. buoyant force acts perpendicular to the earth's surface as the force usually acts perpendicular to the object's gravitational pull which is perpendicular to the earth . so it acts perpendicular to the end
earth's surface

Answer 2

Answer:

Buoyancy (/ˈbɔɪənsi, ˈbuːjənsi/)[1][2] 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. Thus the pressure at the bottom of a column of fluid is greater than at the top of the column. Similarly, the pressure at the bottom of an object submerged in a fluid is greater than at the top of the object. The pressure difference results in a net upward force on the object. The magnitude of the force is proportional to the pressure difference, and (as explained by Archimedes' principle) is equivalent to the weight of the fluid that would otherwise occupy the submerged volume of the object, i.e. the displaced fluid.