AP Physics 1 Question 445: Answer and Explanation
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3. If the speed of a satellite orbiting the Earth at a distance r from the center of the Earth is v, what is the speed of a second satellite orbiting the Earth at a distance 2r from the center of the Earth?
- A. 2v
Correct Answer: C
The gravitational pull of the planet provides the centripetal force on the satellite:
The speed of the second satellite is