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 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 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 freely suspended bar magnet displaced from its N-S direction and released.

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

Which of the following examples represent (nearly) simple harmonic motion and which represent periodic but not simple harmonic motion? (a) The rotation of earth about its axis. (b) Motion of an oscillating mercury column in a U tube, (c) Motion of a ball bearing inside a smooth curved bowl, when released from a point slightly above the lower most position. (d) General vibrations of a polyatomic molecule about its equilibrium position.