40kg disk wiht a radius of 30 cm is spinning around a fixed vertical axis with an angular speed of 10 rad/s. How much work must be done on the disk to bring it to an angular speed of 20 rad/s
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a 40kg disk wiht a radius of 30 cm is spinning around a fixed vertical axis with an angular speed of 10 rad/s. How much work must be done on the disk to bring it to an angular speed of 20 rad/s?
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