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A flat disk is spinning about a rotational axis perpendicular to the disk and through the center of mass.

Suddenly an outer hoop is added that doubles both the mass and radius. No net torque is provided.

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Which of the following values for the angular velocity is most consistent with this change?


The angular velocity is also doubled.


The angular velocity is one-half the original.


The angular velocity is one-quarter the original.


The angular velocity is one-eighth the original.

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