A computer disk is 8.0 cm in diameter. a reference dot on, Ask an Expert

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Q. A computer disk is 8.0 cm in diameter. A reference dot on the edge of the disk is initially located at theta=45 degrees. The disk accelerates steadily for 0.50 s, reaching 2000 rpm, after those coasts at steady angular velocity for another 0.50 s.

What is the tangential acceleration of the reference dot at t = 0.25 s?

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