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Statics force problem - Force required to be a minimum

  1. Sep 29, 2009 #1

    Sxq

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    1. The problem statement, all variables and given/known data:
    If the resultant force acting on the bracket is required to be a minimum, determine the magnitude of F1.


    I understand how to solve problems like this, I just don't understand what it means when it says that the force is required to be a minimum. Any help would be great!

    http://img40.imageshack.us/img40/8929/staticsproblem.png [Broken]
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Sep 30, 2009 #2

    nvn

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    Compute the resultant force. Now try different F1 magnitudes to see if it increases or decreases the resultant force. See if something would minimize the resultant force.
     
  4. Sep 30, 2009 #3

    Sxq

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    A friend said that I should take the derivative (of what?), set it to 0, and find the minimum that way. Does that make any sense?
     
  5. Sep 30, 2009 #4

    nvn

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    That's right, Sxq! Of R, the resultant. R is a function of F1; i.e., R(F1). Give it a try. Hint 1: Don't forget the chain rule. :wink:
     
  6. Sep 30, 2009 #5

    Sxq

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    Okay thanks!
    I got it =p
     
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