A body which is initially at rest at a h...

A body which is initially at rest at a height R above the surface of the earth of radius R, falls freely towards the earth. Find out its velocity on reaching the surface of earth. Take `g=` acceleration due to gravity on the surface of the Earth.

`sqrt((4)/(3)gR)`

`sqrt((2)/(3)gR)`

`4/3gR`

`2gR`

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