Iwas driving along at 20 m/s, trying to change a cd and not watching where i was going. when i looked up, i found myself 45 m from a railroad crossing. and wouldn’t you know it, a train moving at 30 m/s was only 60 m from the crossing. in a split second, i realized that the train was going to beat me to the crossing and that i didn’t have enough distance to stop. my only hope was to accelerate enough to cross the tracks before the train arrived. if my reaction time before starting to accelerate was 0.50 s, what minimum acceleration did my car need for me to be here today writing these words?
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Iwas driving along at 20 m/s, trying to change a cd and not watching where i was going. when i looke...
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