A particle is suspended vertically from a point \( O \) by an inext...

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A particle is suspended vertically from a point \( O \) by an inextensible massless string of length \( L \). A vertical line \( A B \) is at a distance \( L / 8 \) from \( O \) as shown in figure. The object is given a horizontal velocity \( u \). At some point, its motion ceases to be circular and eventually the object passes through the line \( A B \). At the instant of crossing \( A B \), its velocity is horizontal. Find
\( P \)
W
\( u \).
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