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The coefficient of friction between the block P & the surface is 0.25. For the system to be in equilibrium the maximum value of M is $(g = 10 m s^{- 2})$

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$2 k g$

$4 k g$

$3 k g$

$6 k g$

answer is A.

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Detailed Solution

$\begin{array}{l} f = T \cos 45^{0} \Rightarrow μmg = T \cos 45^{0} \to 1 \\ W = Tsin 45^{0} \to 2 \\ Solving 1 & 2 W = 20 N \\ \Rightarrow m = 2 kg \end{array}$

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