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Q. A computer disk is 8.0 in diameter. A reference dot on the edge of the disk is initially located at the disk accelerates steadily for 0.50, reaching 2000, after that coasts at steady angular velocity for another 0.50. What is the tangential acceleration of the reference dot at = 0.25? What is the centripetal acceleration of the reference dot at = 0.25? What is an angular position of the reference dot at = 1.0? What is the speed of reference dot at = 1.0?

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