On applying a constant torque, a wheel a...

On applying a constant torque, a wheel at rest, turns through `400` radian in `10 s`. Find angular acceleration. If same torque continues to act, what will be angular veclocity of the wheel after `20 s` from stars ?

`8 rad s^(-2)`

`5 rad s^(-2)`

`6 rad s^(-2)`

`7 rad s^(-2)`

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