The moon has many satellites keeping uniform circular motion
around it in different tracks, what is the maximum speed the satellites would
achieve by changing the radius of their orbits? We know that the moon has a
mass of 7.36 × 10^{22}kg and a radius of 1.73 × 10^{6}m (in
m/s, G = 6.67 × 10^{-11} N (m/kg) ²) .

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