Question

A balloon filled with air is weighted, so that it barely floats in water as shown in figure. When it is pushed down so that it gets submerged a short distance in water, then the balloon :-

• A. Will come up again to its former position
• B. Will remain in the position it is left
• C. Will sink to the bottom
• D. Will emerge out of liquid

Answer 1

The correct option is A Will come up again to its former position

Assuming that "barely able to float" means that it still IS able to float,

then it's density is still less than water's and it will return to the surface

after being pushed below the surface.

However, if by "barely able to float" the questions means that

the weighted balloon's density is the same as water's,

then it will not return to the surface of the water;

it will just continue to float at the depth.

Hence Option $A$ is correct.