Any motion that is regular and repeating is referred to as a periodic motion. most objects that vibrate do so in a regular and repeated fashion much like this spring seen here. according to newton's 1st law of motion,
a) the greater the mass of the spring, the greater the periodic motion.
b) the lower the mass of the spring, the faster the repeating motion occurs.
c) the periodic motion will continue forces acting on the spring are unbalanced.
d) there is an equal and opposite reaction force that slows down the periodic motion.
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