Sharon the ant (Aaron’s sister) sits at the edge of a turntable of radius R that is spinning with period T. As she makes one-half of a full rotation on the turntable, what is the magnitude of the average acceleration experienced by Sharon the ant?

Explanation:

The acceleration of a circular motion is given by

where is the angular velocity and is the radius.

Angular velocity is related to the period, T, by

Substitute into the previous formula.

This acceleration does not depend on the linear or angular displacement. Hence, the amount of rotation does not change it.

answer: b.

explanation:

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