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Two blocks each of mass m are connected with springs of force constant k. Initially springs are relaxed. Mass A is displaced to left and B is displaced towards right by same amount and released then time period of oscillation of any one block (Assume collision to be perfectly elastic)

  1. 2 pi square root of fraction numerator m over denominator k end fraction end root    
  2. 2 pi square root of fraction numerator m over denominator 2 k end fraction end root    
  3. pi square root of fraction numerator m over denominator k end fraction end root    
  4. pi square root of fraction numerator m over denominator 2 k end fraction end root    

The correct answer is: pi square root of fraction numerator m over denominator k end fraction end root

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