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)?
(a) It is not periodic motion because motion does not repeat itself after a regular interval of time.
(b) the given graph illustrates a periodic motion, which is repeating itself after every 4 seconds.
(c) The given graph does not exhibit a periodic motion because the motion is repeated in unequal intervals of time.
(d) It is periodic motion which is repeating itself in 5 seconds.
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