<p>A hanging mass M is connected to a four times bigger mass by using a string-pulley arrangement, as shown in the figure. The bigger mass is placed on a horizontal ice-slab and being pulled by 2 Mg force. In this situation, tension in the string is&nbsp;<span class="equation">\(\frac{x}{5}\)</span>Mg for x = ________. Neglect mass of the string and friction of the block (bigger mass) with ice slab. (Given g =&nbsp;acceleration due to gravity)</p>

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