Question: An isolated object is initially spinning at a constant speed. Then, although no external forces act upon it , its rotational speed increases. This must

An isolated object is initially spinning at a constant speed. Then, although no external forces act upon it, its rotational speed increases. This must be due to
Multiple Choice
an increase in the rotational inertia.
an increase in the mass.
an increase in the angular momentum.
a decrease in the rotational inertia.
impossible, angular momentum conservation is violated.P
An isolated object is initially spinning at a

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