Question

Motion of the needle of a sewing machine is ____________.

Answer 1

1. The needle of a sewing machine, while moving up and down, repeats its motion after regular intervals. So it possesses periodic Oscillatory motion.
2. Periodic motion is defined as a motion that is repeating at equal intervals of time.
3. Oscillatory motion is defined as the to and fro motion of the body about a fixed position
4. Oscillatory motion is a kind of periodic motion.
5. Time taken to complete one oscillation is called the time period.

Thus, the motion of the needle of a sewing machine is Periodic Oscillatory motion.