Which of the following examples represent periodic motion?
(a) A swimmer completing one (return0trip from one bank of a river to other bank. (b) A freely suspended bar megnet 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.

Which of the following examples represent periodic motion? (a) A swimmer completing one return trip from one bank of a river to other 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.

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 represent periodic motion? An arrow released from a bow.

Which of the following examples represent periodic motion? A hydrogen molecule rotating about its center of mass.

Which of the following examples represent periodic motion? A freely suspended bar magnet displaced from its N-S direction and released.