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A disk rotates with constant angular acceleration. The initial angular speed of the disk is 2 rad/s. After the disk rotates through 1 radians, the angular speed is 17rad/s.

1. What is the magnitude of the angular acceleration?

2. How much time did it take for the disk to rotate through 1? radians?

3. What is the tangential acceleration of a point located at a distance of 6.4 cm from the center of the disk?

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