(Answered) Starting from rest a disk rotates about its central axis

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Starting from rest, a disk rotates about its central axis with constant angular acceleration.In 5.0 s,it rotates 25 rad. During that time what are the magnitudes of:

(a) the angular acceleration?

(b) the average angular velocity?

(d) With the angular acceleration unchanged,through what additional angle will the disk turn during the next 5.0 s?

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