A satellite is revolving in a circular o...

A satellite is revolving in a circular orbit at a height 'h' from the earth's surface (radius of earth R, h ltltR). The minimum increase in its orbital velocity required, So that the satellite could escape from the erth's gravitational field, is close to :(Neglect the effect of atomsphere.)

`sqrt(gR`

`sqrt(gR//2`

`sqrtgR` (`sqrt2`-1

`sqrt2gR`

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