Question

Find the odd one out giving reason:

a) Periodic motion, oscillatory motion, vibratory motion, random motion

Answer 1

Random motion.

Any motion that repeats itself over and over again at regular intervals of time is called periodic motion.

If a body moves back and forth repeatedly about its mean position, its motion is said to be oscillatory or vibratory motion.

Hence the three repeats themselves over and over again at regular intervals.

Hope it helps.