Question

2) The to and fro movements or vibration is
known as ___________

Answer 1

Answer:

vibratory

Motion that moves to and fro in regular time intervals is called vibratory or oscillatory motion.

Explanation:

hope it helps:)

Answer 2

Answer:

vibratory

Explanation:

Motion that moves to and fro in regular time intervals is called vibratory or oscillatory motion