AP Physics 1 Question 445: Answer and Explanation

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Question: 445

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
  • B.
  • C.
  • D.

Correct Answer: C

Explanation:

C

The gravitational pull of the planet provides the centripetal force on the satellite:

The speed of the second satellite is