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A disk of radius 10 cm, initially at rest, begins rotating about its axis with a constant angular acceleration of 8.2 rad/s2. What are the following values at t = 4.0 s?

(a) the angular velocity of the disk in rad/s

(b) the tangential acceleration at and the centripetal acceleration ac of a point at the edge of the disk at = ac = m/s2

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