2. Example 12.19 A 20-cm-diameter, 2.0 kg solid disk is rotating at 200 rpm. A 20-cm-diameter, 1.0 kg circular loop is dropped straight down onto the rotating disk. Friction causes the loop to accelerate until it is \"riding\" on the disk. What is the final angular velocity of the combined system?
A pictorial representation of the circular loop drops onto the rotating disk
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