Physics, 27.06.2019 00:20 indiaseel5940

Unlike the older vinyl records which rotated at a constant ω of 33.3 rotations per minute (rpm), compact disks vary their rotation speed during the playing period. a certain cd has a diameter of 12cm and a playing time of 77 minutes. when the music starts, the cd is rotating at 480 rpm. at the end of the music, the cd is rotating at 219 rpm.
1) what is the final rotational velocity of a point on the very outer edge of the disk?
2) what is the final rotational velocity of a point that is half way between the center of the disk and the outer edge?
3) what is the final tangetial speed of a point on the very outer edge of the disk?
4) what is the final tangential speed of a point half way between the center of the disk and its
5) what is the magnitude of the average angular acceleration of the disk during this playing period?

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Unlike the older vinyl records which rotated at a constant ω of 33.3 rotations per minute (rpm), com...

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