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A space craft with a mass equal to .25 x Mmoon is in orbit about the sun with a period of 3 years.
1) Calculate the average radius of the space craft's orbit. (The distance from the space craft to the sun.)
2) If this craft approached the earth so that it was one Earth radius from the surface of the earth, what force would the space craft exert on you if your mass is 80 kg? What force would the space craft exert on the Earth?
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