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Homework Help: Help with decelleration, acceleration and time!

  1. Mar 13, 2009 #1
    delete please.
    Last edited: Mar 13, 2009
  2. jcsd
  3. Mar 13, 2009 #2
    Hi, welcome to PF.

    You need to use [tex]v^{2}-u^{2}=2as[/tex] where u is the initial velocity, v the final, s is the displacement and a is the acceleration. From this you can find s and then find t.
  4. Mar 13, 2009 #3
    You have everything you need.

    Imagine two trains running together on parallel tracks. One slows down, stops for a while and then accelerates back to cruising speed. The other one is now a good way ahead. What you have to find is the time seperation between these two trains as they pass through the next station without stopping.
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