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Q. 14.1 Which of the following examples represent periodic motion?
(a) A swimmer completing one (return) trip from one bank of a river to the other and bank.
(b) A freely suspended bar magnet displaced from its N-S direction and released.
(c) A hydrogen molecule rotating about its centre of mass.
(d) An arrow released from a bow
Answers (1)
(a) The motion is not periodic though it is to and fro.
(b) The motion is periodic.
(c) The motion is periodic.
(d) The motion is not periodic.
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