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2 June, 05:14

Velocity can be either positive or negative, depending on the direction of the displacement. The time interval, Ît, is always positive. Why?

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  1. 2 June, 08:15
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    Answer:The time interval is always positive quantity because time always moves forward. Time can not be reversed.

    Explanation:

    Velocity is defined as rate of change of position nothing but the displacement. Displacement can be positive or negative.

    In case of time interval, time is always a positive quantity. it is impossible to reverse the time. To obtain any displacement we need to measure the time taken. which has to be positive. It always moves forward.
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