What type of motion moon does around the Earth, assuming the orbit to be a perfect circle?
A
Periodic motion.
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B
Rotational motion.
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C
Circular motion.
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D
Random motion.
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Solution
The correct option is C Circular motion. Moon continuously moves in an approximate circular path around the Earth. It repeats one circle around the Earth everytime in 27.3 days which makes the motion periodic in nature. Rotational motion happens when an object revolves about its own centre. Moon and Earth revolve about their centres.