A system of pulleys is shown in the figure. If $W$ is $3600 k g . w t$ , what force $F$ is required to raise it? Neglect friction and weight of pulleys.

300 k g f

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600 k g f

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1200 k g f

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450 k g f

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Solution

The correct option is B $300 k g f$
Here, $T = W = 3600 k g f$ .
$⟹ F = \frac{T}{12} = \frac{3600}{12} = 300 k g f$

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