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) ?

Explanation

(i) figure, (a) does not represent periodic motion, as the motion neither repeats not comes to mean position.
(ii) figure, (b) represents periodic motion with period equal to 2s.
(iii) figure (c) does not represent periodic motion, because it is not identically repeated.
(iv) figure, (d0 represents periodic motion with period equal to 2s.