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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. If the kinetic energy lost is fully converted to heat then heat produced is

  1. fraction numerator 1 over denominator 3 end fraction m V to the power of 2 end exponent    
  2. fraction numerator 2 over denominator 3 end fraction m V to the power of 2 end exponent    
  3. 0    
  4. fraction numerator 1 over denominator 6 end fraction m V to the power of 2 end exponent    

The correct answer is: 0

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