# A satellite of mass ms travels in a circular orbit of radius a around a planet of mass mp?ms. Part A Derive expressions for the orbital speed of a satellite. Express your answer in terms of some or all of the variables mp, ms, a, and gravitational constant G. vs = SubmitMy AnswersGive Up Part B Derive expressions for the energy of a satellite. Express your answer in terms of some or all of the variables mp, ms, a, and gravitational constant G.

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Answers : part A => vs= square root (Gmp/a). Part B => Energy of satellite = - G(mp) (ms) / 2a.

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