A computer hard disk 80 cm in diameter is initially at rest


Problem: A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerates at 680rad/s2 for 12s, then coasts at a steady angular velocity for another 12s.

Part A: What is the speed of the dot at t = 1.0 s?

I need help to determine the speed of the dot.

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Physics: A computer hard disk 80 cm in diameter is initially at rest
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