Question

Why buoyant force is always acted in upward direction

Answer 1

This causes difference of pressure therefore a net force on the balloon. Buoyancyrefers to the upward force exerted by a fluid against the weight exerted by an immersed object. The pressure difference between the top and bottom portion of the submerged object in the fluid causes this upward force.

Answer 2

Answer:

This causes difference of pressure therefore a net force on the balloon. Buoyancyrefers to the upward force exerted by a fluid against the weight exerted by an immersed object. The pressure difference between the top and bottom portion of the submerged object in the fluid causes this upward force