Physics-
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Question

A uniform rod of length 1 is pivoted at point A. It is struck by a horizontal force which delivers an impulse J at a distance x from point A as shown in fig, impulse delivered by pivot is zero if x is equal to

  1. fraction numerator l over denominator 2 end fraction    
  2. fraction numerator l over denominator 3 end fraction    
  3. fraction numerator 2 l over denominator 3 end fraction    
  4. fraction numerator 3 l over denominator 4 end fraction    

The correct answer is: fraction numerator 2 l over denominator 3 end fraction

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