Physics-
General
Easy

Question

Block A in the figure is released from rest when the extension in the spring is x0 The maximum downward displacement of the block is :

  1. fraction numerator M g over denominator 2 K end fraction minus x subscript 0 end subscript    
  2. fraction numerator M g over denominator 2 K end fraction plus x subscript 0 end subscript    
  3. fraction numerator 2 M g over denominator K end fraction minus x subscript 0 end subscript    
  4. none of these    

The correct answer is: fraction numerator M g over denominator 2 K end fraction plus x subscript 0 end subscript


    Apply work energy theorem
    0 equals M g times x minus fraction numerator 1 over denominator 2 end fraction k open square brackets left parenthesis 2 x right parenthesis to the power of 2 end exponent minus x subscript 0 end subscript superscript 2 end superscript close square brackets

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