Question

Fig. 14.23 depicts four x-t plots for linear motion of a particle. Which of the plots represent periodic motion? What is the period of motion (in case of periodic motion) ?

Answer 1

This is not a periodic motion as there is no repetition and this depicts an unidirectional motion.

The motion of the particle repeats itself after every two seconds hence it is the periodic motion.

This is not a periodic motion as the particle repeats itself in one position only whereas for the motion to be periodic entire motion repeat itself.

The motion of the particle repeats itself after every two seconds and therefore it is a periodic motion.