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A smooth ball 'A' moving with velocity 'V' collides with another smooth identical ball at rest. After collision both the balls move with same speed with angle between their velocities 60 to the power of ring operator end exponent No external force acts on the system of balls. The value of coefficient of restitution is

  1. 1    
  2. fraction numerator 1 over denominator 3 end fraction    
  3. fraction numerator 1 over denominator square root of 3 end fraction    
  4. 0    

The correct answer is: fraction numerator 1 over denominator square root of 3 end fraction

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