Physics-
General
Easy

Question

If net force on a system in a particular direction is zero (say in horizontal direction) we can apply: sum m subscript R end subscript x subscript R end subscript equals sum m subscript L end subscript x subscript L end subscript comma sum m subscript R end subscript v subscript R end subscript equals sum m subscript L end subscript v subscript L end subscript text  and  end text sum m subscript R end subscript a subscript R end subscript equals sum m subscript L end subscript a subscript L end subscript Here R stands for the masses which are moving towards right and L for the masses towards left, x is displacement, v is velocity and a the acceleration (all with respect to ground). A small block of mass m = 1 kg is placed over a wedge of mass M = 4 kg as shown in figure. Mass m is released from rest. All surfaces are smooth. Origin O is as shown. Final velocity of the wedge is m/s :–

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

The correct answer is: fraction numerator 1 over denominator square root of 2 end fraction

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