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  • A satellite is revolving in a circular orbit at a height ‘h’ from the earth’s surface (radius of earth R ; h << R). The minimum increase in its orbital velocity required,

A satellite is revolving in a circular orbit at a height ‘h’ from the earth’s surface (radius of earth R ; h << R). The minimum increase in its orbital velocity required, so that the satellite could escape from the earth’s gravitational field, is close to : (Neglect
the effect of atmosphere.)
Option: 1

\sqrt{2gr}


Option: 2

\sqrt{gr}


Option: 3

\sqrt{ \frac{gr}{2}}


Option: 4

\sqrt{gr}(\sqrt{2}-1)


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