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Homework Help: Find the constant acceleration of the train

  1. Mar 11, 2009 #1
    1. The problem statement, all variables and given/known data
    Liz rushes down onto a subway platform to find her train
    already departing. She stops and watches the cars go by.
    Each car is 8.60 m long. The first moves past her in 1.50 s
    and the second in 1.10 s. Find the constant acceleration of
    the train.

    2. Relevant equations

    3. The attempt at a solution
    vi = 8.6/1.5
    vf = 8.6/1.1
    a = 2(vf - vi)/2.6
    any advice? i'm confused
  2. jcsd
  3. Mar 11, 2009 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Re: acceleration

    You're given distance and time, so what kinematic formula relates those two for constant acceleration?
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