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Practice 3.1
What is the orbital period (in years) of a planet with a semimajor axis of 10 AU?Question 2What is the semimajor axis (in AU) of a planet with an orbital period of 25 years?Question 3What is the force of gravity acting between the Earth and a 100-kg person standing on the surface?Question 4What is the force of gravity acting between the Earth and a 60-kg person who is 400 km above the surface of the Earth?Question 5What is the force of gravity acting between the Sun and a 80-kg person who is 0.8 AU away from the Sun?