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Q.

Is it true that the motion of a needle in a sewing machine is periodic?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
“Periodic motion is a motion that repeats itself after a specific time”.
The motion of a sewing machine needle is periodic because it moves up and down continuously.
Periodic motion can also be seen in the motion of a clock pendulum and the strings of a guitar.
 
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