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Homework Help: Help me understand please (short one!)

  1. Apr 16, 2012 #1
    1. The problem statement, all variables and given/known data

    This is in a written example of some lecture notes that I have.
    Is in the middle of a question about the forces of contact between two blocks on a smooth table.
    I don't need help with the rest of the question.

    I just want to know how to get from equation 1 below to equation 2.
    Is it some math shortcut that I am unaware of or am I missing out on some calculations

    2. Relevant equations


    Goes to

  2. jcsd
  3. Apr 16, 2012 #2
    Don't worry, it's simple math calculation:


    which then becomes:

    ##F(\frac{m_2}{m_1+m_2})## or can be written as ##(\frac{m_2}{m_+m_2})F##
  4. Apr 16, 2012 #3
    Thank you so much! :)
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