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Physics-esque question

  1. Sep 11, 2008 #1


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    Use Newton's version of Kepler's third law to answer the following questions. (Hint: The calculations for this problem are so simple that you will not need a calculator.) Imagine another solar system, with a star of the same mass as the Sun. Suppose there is a planet in that solar system with a mass twice that of Earth orbiting at a distance of 1 AU from the star. What is the orbital period of this planet? Explain.

    Any thoughts?
  2. jcsd
  3. Sep 11, 2008 #2


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    Welcome to PF!

    Hi lnl! Welcome to PF! :smile:

    Show us what you've tried, and where you're stuck, and then we'll know how to help. :smile:
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