<p>A block of mass &#39;m&#39; (as shown in figure) moving with kinetic energy E compresses a spring through a distance 25 cm&nbsp; when, its speed is halved. The value of spring constant of used spring will be nE&nbsp;<span class="equation">\(Nm^{-1}\)</span>&nbsp;for n =_______</p>

<p><img alt="" src="https://school.achievam.com/upload/questionbank/question/que_1759483013.png" style="height:120px; width:194px" />​​​​​​​</p>

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