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Question

The figure shows a man of mass m standing at the end A of a trolley of mass M placed at rest on a smooth horizontal surface. The man starts moving towards the end B with a velocity urel with respect to the trolley. The length of the trolley is L When the man starts moving, then the velocity of the trolley v2 with respect to ground will be

  1. fraction numerator M u subscript r e l end subscript over denominator m plus M end fraction    
  2. fraction numerator m u subscript r e l end subscript over denominator m plus M end fraction    
  3. fraction numerator m over denominator M end fraction u subscript r e l end subscript    
  4. fraction numerator M over denominator m end fraction u subscript r e l end subscript    

The correct answer is: fraction numerator m u subscript r e l end subscript over denominator m plus M end fraction

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