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Homework Help: Uniform Acceleration Question

  1. Mar 8, 2006 #1
    A train starts from a station A, and moves with uniform acceleration. In 1.5 minutes it passes a station B, and 1 minute later another station C. If the distance between B and C is 1,200 yards, find (a) the acceleration of the train, (b) the distance between A and B.
    I do not know how to find the acceleration!
    The formulae are: v=u+at; s=ut+1/2at^2; v^2=u^2+2as;
    where: v= final velocity, in ft/s,
    u= initial velocity, in ft/s,
    a= acceleration, in ft/s/s,
    t= time in seconds.
    Thanks in advance.
     
  2. jcsd
  3. Mar 8, 2006 #2

    NateTG

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    Can you find the average velocity of the train during the last minute?
     
  4. Mar 8, 2006 #3
    Thanks for the quick reply, and that solves my problem
     
  5. Mar 8, 2006 #4
    try using the equation s=u*t+1/2a*t^2

    first find u given the contraints of the problem. Now you want to find the train's acceleration: what two pieces of information do you have in order to get the acceleration of the train? Think about assigning the distance from station A to B as a variable and using that in order to find the acceleration between the two points you know.

    ~Lyuokdea
     
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