A thin uniform rod of length / and mass ...

A thin uniform rod of length / and mass m is swinging freely about a horizontal axis passing through its end. Its maximum angular speed is `omega` . Its centre of mass rises to a maximum height of

`(1)/(6) (l omega)/(g)`

`(1)/(2) (l^(2) omega^(2))/(g)`

`(1)/(6) (l^(2) omega^(2))/(g)`

`(1)/(3) (l^(2) omega^(2))/(g)`

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