Physics-
General
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Question

A uniform bar of length 6 a & mass 8m lies on a smooth horizontal table. Two-point masses m & 2 m moving in the same horizontal plane with speeds 2 v and v respectively strike the bar as shown in the figure & stick to the bar after collision. Velocity of the centre of mass of the system is

  1. fraction numerator v over denominator 2 end fraction    
  2. v    
  3. fraction numerator 2 v over denominator 3 end fraction    
  4. Zero    

The correct answer is: Zero

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