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A uniform rod of length 2l and mass m is placed on fixed sphere and the rod is held horizontal. The rod is released from rest with one fourth of length on one side of sphere. The normal reaction of sphere on the rod as soon as rod is released is

  1. fraction numerator M g over denominator 43 end fraction    
  2. fraction numerator 16 M g over denominator 43 end fraction    
  3. fraction numerator 3 M g over denominator 4 end fraction    
  4. fraction numerator M g over denominator 2 end fraction    

The correct answer is: fraction numerator 16 M g over denominator 43 end fraction

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