Question

please explain the line clearly with examples.Vibration means a kind of rapid to and fro motion of an object

Answer 1

$\huge\red{As-Salamu-Alykum}$

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$\huge\pink{Vibration:-}$

Vibration is the to and fro motion of a body

$\huge\orange{Explaination:-}$
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To and fro motion means about a mean body . When a body vibrates it moves from its mean position to extreme position and then from extreme position to mean position and in this way it repeats again and again ,

So to and fro motion means movement of bob from :-

Mean --->- extreme----->mean------>-extreme-------> mean

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