What is the orbital speed of the second satellite?

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.60 104 m/s, and the radius of the orbit is 5.40 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has a radius of 8.80 106 m. What is the orbital speed of the... show more A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.60 104 m/s, and the radius of the orbit is 5.40 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has a radius of 8.80 106 m. What is the orbital speed of the second satellite?
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