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A light spring is compressed and placed horizontally between a vertical fixed wall and a block free to slide over a smooth horizontal table top as shown in the figure. The system is released from rest. The graph which represents the relation between the magnitude of acceleration ‘ a ‘ of the block and the distance ‘ x ‘ travelled by it (as long as the spring is compressed) is:

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The correct answer is:


    Let the initial compression of spring be l Then the acceleration after the block travels a distance x is
    a equals fraction numerator k over denominator m end fraction open parentheses l minus x close parentheses

    \ The graph of a vs x is

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