## Related questions with answers

The same hemisphere of the moon always faces Earth. Thus, the motion of the moon about Earth for a given time interval can be modeled by a rotation. The center of the rotation is the center of Earth. The angle of rotation is determined by the time interval, given that one journey of the moon around Earth takes about $27 \frac{1}{3}$ days.

What rotation is modeled by the motion of the moon?

A. a circle rotating about its center

B. a circle rotating about a point

C. 2 circles rotating around each other

D. a circle rotating around a circle

Solution

VerifiedGiven the figure, the rotation of the moon about the Earth is like a circle rotating about its center. The moon is one point in the circle while the eart is the center of the circle. Therefore the answer is $A$.

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