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The earth is revolving round the sun. Is...

The earth is revolving round the sun. Is it an example of a simple harmonic motion? Explain.

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In case of motion of the earth (if we consider earth.s orbit to be spherical), its acceleration is directed towards a particular point (sun). But this motion is not linear. Also, the value of acceleration does not vary proportionally with the distacne of the earth from the sun. Hence, the earth.s revolution around the sun is not an example of simple harmonic motion.
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