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Rearranging equations

  1. Sep 8, 2010 #1
    Hi, my algebra skills are a bit rusty so can someone tell me if I've rearranged this equation correctly. This is the original
    M=rv²/G

    I need to make r the subject so I put
    r=GM/v²

    Ist that right? Looks a bit off to me. Thanks
     
  2. jcsd
  3. Sep 8, 2010 #2

    Borek

    User Avatar

    Staff: Mentor

    It is OK.

    Do you remember how to rearrange? In short - you can do the same operations on both sides of the equal side. So you can multiply both sides by G, and you can divide both sides by v2 (assuming v2 is not zero) - check what cancels out.
     
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