What should be the minimum force \( \mathrm{P} \) to be applied to the string so that block of m...

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What should be the minimum force \( \mathrm{P} \) to be applied to the string so that block of mass \( \mathrm{m} \) just begins to move up the frictionless plane.
(A) \( \operatorname{Mg} \tan \theta / 2 \)
(B) \( \mathrm{Mg} \cot \theta / 2 \)
(C) \( \frac{\mathrm{Mg} \cos \theta}{1+\sin \theta} \)
(D) None
\( P \)
W
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