A disk drive is spinning at 10,000 rpm (1045 rad/s).  It decelerates to rest in 0.42 s.  The disk is 0.115 m in diameter with a mass of 17 grams.  What is the magnitude of the tangential accelertation at a point 1/2 of the way out from the center?  Find the rotational inertia of the disk, and the magnitude of the torque required to decelerate the disk

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