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Question

Which of the following regarding oscillatory motion is true?
  1. Motion of the earth is periodic but not oscillatory because it is not to and fro.
  2. Quivering of the string of the musical instrument is an example of oscillatory motion
  3. Motion of the earth is periodic and oscillatory motion because it is not to and fro.
  4. None of the above

A
Motion of the earth is periodic but not oscillatory because it is not to and fro.
B
Quivering of the string of the musical instrument is an example of oscillatory motion
C
Motion of the earth is periodic and oscillatory motion because it is not to and fro.
D
None of the above
Solution
Verified by Toppr

Oscillator motion is to and fro motion about a mean position. Earth motion is not a to and fro motion here, hence it is not an oscillatory motion. But as earth motion is repeated in a regular interval of time, its motion is periodic.

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