*55. Sometimes there are two possible answers to a kinetic problem, each one pertaining to different situations.
Discuss one such case.
*56. Often, traffic lights of a series of intersections are timed so that if you travel at a certain constant speed, you
can avoid all the red lights throughout. Discuss, how the timings of the different coloured lights are
determined, considering that the distance between them varies from one crossing to next?
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I don't know sorry very sorry
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