The factors affecting the buoyant force

1.    Buoyant force (Fb) is directly proportional to the density of the liquid, at constant volume. (Fb a rL)

2.    Buoyant force is directly proportional to the volume of the liquid immersed, at constant density of the liquid. (Fb a Vimmersed).

3.    Buoyant force is directly proportional to the acceleration due to gravity. (Fb a g).

If the liquid cylinder is replaced by a solid cylinder of the same volume :

Fb is the same ,because Vimmersed is the same.

\ Fb = rLgVimmersed

         The resultant force = Fb – Ws

= rLgVimmersed  -  rLgVimmersed