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Which of the following examples represent periodica) Aswimmer completing one (return) trip from one bannk of a river to the other14.1motion?and back(bi A freely suspended bar magnet displaced from its N-S direction and releasedfe) A hydrogen molecule rotating about its centre of mass.d) An arrow released from a bowWhich of the following examples represent inearly) simple harmondemotion andharmonie motion?

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