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Homework Help: Motion at a Constant Acceleration - Newton's Laws

  1. Jul 17, 2008 #1
    Suppose you want to design an air bag sytem that can portect the driver in an head-on collision at a speed of 100 km/h. Estimate how fast the airbag must inflate to protect the driver.

    The answer to this question would be--

    t= 0-28/ -390 = 0.07 seconds using the law X= Xo + Vo t + 1/2 at

    2. The following question is:

    --Assume the car crumples over a distance of about 1 meter. How does the use of a seat belt help the driver?

    3. The attempt at a solution

    I do not know the answer. I only know that x2 - x1 would be 0 - 100. Can someone please check my work and let me know if I am right or wrong? Thank you for any help. :smile:

    P.S. -- If any extra equations are needed, I have attached a document with my work. =)

    Attached Files:

  2. jcsd
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