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Q. The ratio of the escape velocity and the orbital velocity is

Gravitation

Solution:

Escape Velocity $=\sqrt{\frac{2 GM }{ r }}$, where $G$ is Gravitational constant, $M$ is the mass of the planet and $r$ is the radius of the orbit
Orbital Velocity $=\sqrt{\frac{ GM }{ r }}$
Hence, the ratio of Escape velocity and Orbital velocity is $\sqrt{2}$.