A body crosses the topmost point of a vertical circle with critical speed. Its centripetal acceleration, when the string is horizontal will be
A body crosses the topmost point of a vertical circle with critical speed. Its centripetal acceleration, when the string is horizontal will be
$6\, g$
$3\, g$
$2\,g$
$g$
A body crosses the topmost point of a vertical circle with critical speed. Its centripetal acceleration, when the string is horizontal will be
$v = \sqrt {3gr} $ and $a = \frac{{{v^2}}}{r} = \frac{{3gr}}{r} = 3g$