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1. Martha (50 kg) is attracted to Stewart (70 Kg) who sits 4 m away. What is the
gravitational attraction between them? G=6.67 x 10-11
4. Mars is 7.83 x 1010 m from planet earth. The planet Earth is 5.98 x 1024 Kg while Mars has a mass of 6.42 x 1023 kg. What is the gravitational attraction between the two planets?