rotaional motion

Classical Mechanics Level 4

Two balls of mass \({ m }_{ 1 }=56g\) and \({ m }_{ 2 }=28g\) are suspended on two threads of length \({ l }_{ 1 }=7cm\) and \({ l }_{ 2 }=11cm\) at the end of a freely hanging rod (see fig). Determine the angular velocity \(w\) at which the rod should be rotated about the vertical axle so that it remains in vertical position![]

sorry for blurred image.

Give the answer in rad/s.

round off your answer.


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