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Homework Help: Find mass given acceleration and upward force

  1. Oct 14, 2011 #1
    1. The problem statement, all variables and given/known data
    Find the mass of the body when:
    upward force is 10N
    downward force unknown (mg N)
    acceleration 5ms^-2 downwards


    2. Relevant equations
    F=ma
    W=mg


    3. The attempt at a solution
    Need to work out the resultant force?? Then find the mass from there...


    Thank you!
     
  2. jcsd
  3. Oct 14, 2011 #2
    That's correct.
    Remember that [itex]\sum \vec{F}=m\vec{a}[/itex]
     
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