Suppose a system consisting of the disk and wheel are spinning together, but unl

Question

Suppose a system consisting of the disk and wheel are spinning together, but unlike your experiment, the disk is attached to the bottom of the wheel, not the top. Suppose the Velcro failed, and due to gravity, the disk fell down. Suppose that the disk applied no forces to the wheel at the time that the disk fell. a) Explain in one sentence what happens to the wheel's angular velocity after the disk falls. b) Explain in one sentence what happens to the angular velocity of the disk. c) Explain in one or two sentences why the total angular momentum of the system is conserved. Thank you

Explanation / Answer

Answering pat c) first;

c) No external force is applied on the wheel disc system, so total angular momentum will be conserved.

a) Angular velocity of wheel will increase because of decrese in moment of inertia. (Angular momentum conservation; Iw= constant)

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