Answer to Question #170963 in Physics for Chris

Question #170963

A satellite orbits a planet at 9000 m/s at a distance r. The satellite moves to an orbit that is r/2. What is the new orbital speed of the satellite

Expert's answer

"v=\\sqrt{\\frac{GM}{r}}\\\\v'=\\sqrt{\\frac{2GM}{r}}=\\sqrt{2}v\\\\v'=\\sqrt{2}\\cdot9000=12728\\frac{m}{s}"

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