Two masses $M$ and $m$ are attached to a vertical axis by weightless threads of combined length $l$. They are set in rotational motion in a horizontal plane about this axis with constant angular velocity $\omega $. If the tensions in the threads are the same during motion, the distance of $M$ from the axis is
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(b )If the both mass are revolving about the axis $yy'$ and tension in both the threads are equal then
$M{\omega ^2}x = m{\omega ^2}(l - x)$
$⇒$ $Mx = m(l - x)$
$⇒$ $x = \frac{{ml}}{{M + m}}$
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