Which of the following examples represents periodic motion ? (i) A swimmer completing onė (return) trip from one bank of a river to the other bank. (ii) A freely suspended bar magnet displaced form its N-S direction and released. (iii) Halley's comet (iv) A hydrogen molecules rotating about its centre of mass. (v) An arrow released from a bow.

Which of the following examples represents periodic motion ? (i) A sw

1.	Which of the following examples represents periodic motion ? (i) A swimmer completing onė (return) trip from one bank of a river to the other bank. (ii) A freely suspended bar magnet displaced form its N-S direction and released. (iii) Halley's comet (iv) A hydrogen molecules rotating about its centre of mass. (v) An arrow released from a bow.
Answer» Solution :Examples (II), (III) and (IV) represent PERIODIC motion.