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Acceleration with two forces?

  1. Sep 28, 2008 #1
    1. The problem statement, all variables and given/known data

    A force F0 causes an acceleration of 20 m/s2 when it acts on an object of mass m sliding on a frictionless surface. Find the magnitude of the acceleration of the same object in the circumstances shown in each figure below.

    2. Relevant equations

    I cannot figure out how to do this problem without knowing the mass. Can anyone help?

    3. The attempt at a solution

    ?
     

    Attached Files:

  2. jcsd
  3. Sep 29, 2008 #2

    tiny-tim

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    Science Advisor
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    Welcome to PF!

    Hi a18c18! Welcome to PF! :smile:

    Hint: Just call the mass m, and do all the equations as usual …

    you'll find that you can cancel the m's in the end! :smile:
     
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