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Universal Gravitation Practice Test
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Q1
A certain planet has three times the radius of Earth and nine times the mass. How does the acceleration of gravity at the surface of this planet (ag) compare to the acceleration at the surface of Earth (g)?
A certain planet has three times the radius of Earth and nine times the mass. How does the acceleration of gravity at the surface of this planet (ag) compare to the acceleration at the surface of Earth (g)?
and the second star has a mass of 
. If the stars are 2,000km away, what is the gravitational force felt by the first star?