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A 34.5 kg centrifuge takes 200s to spin up from the test to its final angular speed with constant angular acceleration. A point located 28.00cm

A 34.5 kg centrifuge takes 200s to spin up from the test to its final angular speed with constant angular acceleration. A point located 28.00cm from the axis of rotation of the centrifuge moves with the speed of 420m/s when the centrifuge is at full speed. What is the angular acceleration (in rad/s2) of the centrifuge as it spins up?

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