Question

Hands of the clock -circular motion
Needle of sewing machine is??

Answer 1

Thank you for asking this question.
let me help in finding the answer.
The motion of the needle of sewing machine is a "periodic motion"
Periodic motion is the motion in which a body or thing repeats itself after a certain interval of time.
As the needle of sewing machine moves up and down and repeat it self also with certain time interval it is periodic motion. 

I hope this will help you.

Answer 2

Hi thank you for asking the question
The needle of a sewing machine goes up and down along the same path at constant speed thus the time taken by it will be constant
This type of motion is known as periodic motion.
"The type of motion in which object moves along same path at equal interval of time"
The motion of needle is the same it goes along the same path twice a day