A body crosses the top most point of a vertical circle with critical speed. Its centripetal acce...

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A body crosses the top most point of a vertical circle with critical speed. Its centripetal acceleration, when the string at the top point of circle/loop:
(a) \( 3 \mathrm{~g} \)
(b) \( \mathrm{g} \)
(c) \( 5 \mathrm{~g} \)
(d) \( 6 \mathrm{~g} \)
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