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A uniform rod of length l is from rest s...

A uniform rod of length `l` is from rest such that it rotates about a smooth pivot. The angular speed of the rod when it becomes vertical is.
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Text Solution

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`/_\K+/_\U=0`
`(1/2I_(0)omega^(2)-0)+[-mgl/4]=0`……..i.
`I_(0)=(Ml^(2))/12+m(l/4)^(2)=7/48ml^(2)`….ii
From i andii `omega=2 sqrt((6g)/(7l))`
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