General
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Physics-

For the system shown in the figure, the acceleration of the mass m4 immediately after the lower thread x is cut will be, (assume that the threads are weightless and inextensible, the spring are weightless, the mass of pulley is negligible and there is no friction)

Physics-General

  1. open parentheses fraction numerator m subscript 1 end subscript plus m subscript 2 end subscript minus m subscript 3 end subscript minus m subscript 4 end subscript over denominator m subscript 4 end subscript end fraction close parentheses g    
  2. fraction numerator g over denominator 4 end fraction    
  3. open parentheses fraction numerator m subscript 1 end subscript plus m subscript 2 end subscript minus m subscript 3 end subscript over denominator m subscript 4 end subscript end fraction close parentheses g    
  4. 0    

    Answer:The correct answer is: open parentheses fraction numerator m subscript 1 end subscript plus m subscript 2 end subscript minus m subscript 3 end subscript minus m subscript 4 end subscript over denominator m subscript 4 end subscript end fraction close parentheses g

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