A wheel initially has an angular velocit...

A wheel initially has an angular velocity of 18 rad/s. It has a costant angular acceleration of 2 rad/`s^2` and is slowing at first. What time elapses before its angular velocity is 22 rad/s in the direction opposite to its initial angular velocity?

16 W/`m^2`

25 W/`m^2`

11 W/`m^2`

6 W/`m^2`

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