Which of these is an example of oscillatory motion ?
A
Motion of an electric fan
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B
Motion of a spinning top
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C
Motion of pendulum of a wall clock
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D
Motion of a stone dropped from a roof
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Solution
The correct option is C Motion of pendulum of a wall clock A periodic motion that is to and fro or back and forth motion about a fixed point is called an oscillatory motion. Motion of pendulum of a wall clock is an example of oscillatory as well as periodic motion. A periodic motion is the motion that repeats after fixed intervals of time.