A stream-lined body falls through air from a height `h` on the surface of a liquid . Let `d` and `D` denote the densities of the materials of the body and the liquid respectively, if `D gt d`, then the time after which the body will be intantaneously at rest, is:A. `sqrt((2h)/(g))`B. `sqrt((2h)/(g)(D)/(d))`C. `sqrt((2h)/(g)(d)/(D))`D. `(d)/((D-d))sqrt((2h)/(g))`

A stream-lined body falls through air from a height `h` on the surface

1.	A stream-lined body falls through air from a height `h` on the surface of a liquid . Let `d` and `D` denote the densities of the materials of the body and the liquid respectively, if `D gt d`, then the time after which the body will be intantaneously at rest, is:A. `sqrt((2h)/(g))`B. `sqrt((2h)/(g)(D)/(d))`C. `sqrt((2h)/(g)(d)/(D))`D. `(d)/((D-d))sqrt((2h)/(g))`
Answer» Retardation `=` net weight/mass `=(F_(B)-mg)/(m)` `v=u+at` then calculate for value of time `t` `v=0,u=sqrt(2gh)`

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