8. Centripetal Forces & Gravitation
Newton's Law of Gravity
Multiple Choice
Multiple ChoiceA 2,000-kg spacecraft is blasting away from the surface of an unknown planet the same size as the Earth. At 1500km above the surface, an instrument onboard reads the gravitational force to be 18000 N. What is the planet's mass?
A
8.36×1024kg
B
2.89×1012kg
C
1.67×1028kg
D
5.78×1015kg
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