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## A car traveling at a speed of 30 m/s encounters an emergency and comes to a complete stop (vf = 0 m/s). How much time will it take fo

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## Answers ( )

Answer:Explanation:Use the one-dimensional equation

which says that the final velocity of an object is equal to the object’s initial velocity plus its acceleration times time. We are looking for time. That means the equation looks like this:

0 = 30 + (-4)t and

-30 = -4t so

t = 7.5 sec