MCQ
The rotation of earth about its axis is:
- APeriodic motion.
- BSimple harmonic motion.
- CPeriodic but not simple harmonic motion.
- DNon-periodic motion.
✓
Answer
- Periodic motion.
- Periodic but not simple harmonic motion.
Explanation:
Rotation of earth about its axis repeats its motion after a fixed interval of lime, so its motion is periodic.
The rotation of earth is obviously not a to and fro type of motion about a fixed point, hence its motion is not an oscillation. Also this motion does not follow S.H.M equation, $\text{a}\propto-\text{x}$
Hence, this motion is not a S.H.M.
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