A body crosses the top most point of a vertical circle with critica...

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A body crosses the top most point of a vertical circle with critical speed. What will be its
\( \mathrm{P} \) centripetal acceleration when the string is

W horizontal :-
(1) \( g \)
(2) \( 2 \mathrm{~g} \)
(3) \( 3 g \)
(4) \( 6 g \)
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