A uniform rod AB of mass m length 2a is ...

A uniform rod `AB` of mass `m` length `2a` is allowed to fall under gravity with `AB` in horizontal. When the speed of the rod is `v` suddenly the end `A` is fixed. Find the angular velocity with which it begins to rotate.

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`bar(L_(1) =bar(L_(2)) rArr mva - I omega `
`mva = (m(2a)^(2))/3 omega rArr omega = (3v)/(4a)`

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