Physics-
General
Easy

Question

Three identical rods are hinged at point A as shown. The angle made by rod AB with vertical is

  1. 30º    
  2. 37º    
  3. 45º    
  4. 53º    

The correct answer is: 37º



    Vertical line from hinge A must pass through C.M. of rod system.
    tan invisible function application theta equals fraction numerator O P over denominator A P end fraction equals fraction numerator fraction numerator L over denominator 2 end fraction over denominator L minus fraction numerator L over denominator 3 end fraction end fraction

    tan invisible function application theta equals fraction numerator 3 over denominator 4 end fraction
    Þq = 37º

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