# Circular Motion Problems

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A 12-in. diameter phonograph record rotates about its center by one-quarter turn.

a. Through how many radians has it turned?

b. How far has a point on the rim moved?

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##### Solution Summary

The solution provides step-by-step calculations for radians and rotational distance of a circular object.

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RESPONSE:

Note 1. The circumference of a circle, C= 2 PI R

Note 2. On the circumference, each arc length of one radius R, ...

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