Question

a balloon of volume 'v' and density 'd' is moving upward in air. if the density of air is 'D' then the effective upward acceleration of the body is

1)g(d-D)/d
2)g(D-d)/d
3)g(D-d)/D
4)g(d-D)/D​

Answer 1

4)g(d-D)/D

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