The masses of the Moon and Earth are 7.4 ´ 1022 kg and 6 ´ 1024 kg, respectively. Earth-Moon distance is 3.8 ´ 108 m. What is the size of the gravitational force between Earth and the Moon? The gravitational constant is G = 6.67 ´ 10-11 N-m2/kg2.
A. 2.05 ´ 1020 N
B. 7.79 ´ 1028 N
C. 3.07 ´ 1030 N
D. 1.17 ´ 1039 N
Ans: A. 2.05 ´ 1020 N
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