1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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

    I need to make r the subject so I put

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


    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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook