Please give proper explaination of the answer and I will mark the best answer as the brainliast .
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Hello mate,
Explanation:
(a)Does not represent motion in one dimension because
a particle cannot have two different speeds at a time.
(As far as not considering the weirdness of quantum world.)
(b)Does not represent motion one dimension because speed=distance/time.So as time goes the distance covered by a body cannot decrease it will only increase if the particle is moving ,but displacement can decrease.
Hope the qn is answered
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