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

Question

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 for the car to stop if its acceleration is -4 m/s2?

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Nguyệt Ánh 4 years 2021-07-24T08:55:01+00:00 1 Answers 20 views 0

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  1. thaiduong
    0
    2021-07-24T08:57:00+00:00
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    Answer:

    Explanation:

    Use the one-dimensional equation

    v_f=v_0+at 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

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