Question

4. Which is an example of a periodic motion?
(a) Oscillation of a pendulum
(b) Motion of a bus on road
(c) A spinning top
(d) A stone dropped from a certain height​

Answer 1

answer:

(a) Oscillation of a pendulum

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Answer 2

(a) Oscillation of a pendulum

Hence , Option A is corret

Explaination :

Oscillatory motion is the repetitive motion of the system around its fixed point. It is to and fro motion of an object from its mean position. Examples: movement of a spring, alternating current or oscillation of simple pendulum.

i) motion of a swing-oscillatory motion.

ii) motion of earth around the sun--circular motion

iii) motion of cyclist on a plain road-linear motion

iv)motion of a falling stone-vibratory motion.

v) The motion of plucked string of a sitar-vibratory motion.