A block is attached to a spring as shown and very-very gradually lowered so that finally  spring expands by $"d"$. If same block is attached to spring & released suddenly then maximum expansion in spring will be-

823-559

  • A

    $d$

  • B

    $2\,d$

  • C

    $3\,d$

  • D

    $4\,d$

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