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Escape and orbital velocity
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If $v_e$ is escape velocity and $v_o$ is orbital velocity of a satellite for orbit close to the earth's surface, then these are related byEscape velocity: $v_e = \sqrt{\frac{2GM}{R}}$
Orbital velocity close to the surface: $v_o = \sqrt{\frac{GM}{R}}$
$\frac{v_e}{v_o} = \sqrt2 \Rightarrow v_e = \sqrt2v_o$