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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.)

A

`sqrt(gR)`

B

`sqrt(gR//2)`

C

`sqrt(gR(sqrt2-1))`

D

`sqrt(2gR)`

Text Solution

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The correct Answer is:
C
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