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Solution_midterm_Wed - SO~1 c IOmm ~ W hQ;~ ~&0 fA C\~...

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The rigid metal strip of negligible weight is used as part of an electromagnetic switch. If the stiffness of the springs at A and B is k = 5 N/m, and the strip is originally horizontal when the springs are unstretched, detennine the smallest force needed to close the contact gap at C.
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