A horizontal disk with a moment of inertia I1 is rotating freely at an angular speed of
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A horizontal disk with a moment of inertia I1 is rotating freely at an angular speed of ω1 when a second, nonrotating disk with a moment of inertia I2 is dropped on it (Fig. 10-11). The two then rotate as a unit. Find the final angular speed. Ignore the central rod.
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1₁ + 701 Fig. 10-11
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