Question

A wheel is rotating freely about a vertical axis with constant angular velocity. Small parts of the wheel come loose and fly off. How does this affect the rotational speed of the wheel? Is angular momentum conserved? Is kinetic energy conserved? Explain.

Solutions

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Answered 1 year ago

In order to answer this question, we will need first Newton's law which says that the pieces of the wheel that fly off will carry their share of angular momentum. This means that the angular velocity will remain the same since the angular momentum will decrease due to the moment of inertia decrease. The rotational kinetic energy will not be conserved as well as the translational kinetic energy.

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