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Finding magnitude & direction in equillibrium

  1. Oct 8, 2008 #1
    An object in equilibrium has three forces exerted on it. A 28-N force acts at 90°, and a 65-N force acts at 60°. What is the magnitude and direction of the third force?

    I HAVE NO IDEA HOW TO DO THIS...
    PLEASE HELP!
     
  2. jcsd
  3. Oct 8, 2008 #2
    If the object is in equilibrium, its not accelerating in any of the referred/assumed directions. The net force should sum to 0N in all such directions.
     
  4. Oct 9, 2008 #3
    thank you so much!
    that was exactly what I needed to know
     
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