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Homework Help: Beginner PHYSIC problem HELP nneded

  1. Aug 27, 2010 #1
    1. The problem statement, all variables and given/known data

    Two train cars are on a straight, horizontal track. One car starts at rest and is put in motion with a constant acceleration of 2.4 m/s2. This car moves toward a second car that is 29 m away and moving at a constant speed of 4.0 m/s.

    a.) where will they collide
    b.) how long will it take to collide

    2. Relevant equations

    3. The attempt at a solution
    My original plan to solve this problem was to set up two seperate Kinematics equaitons .
    I also put a negative sign infront of - 4.0m/s. My answer came out like 8.743 s .

  2. jcsd
  3. Aug 27, 2010 #2


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    Staff Emeritus
    Science Advisor
    Homework Helper

    Welcome to Physics Forums.

    Yes, the kinematics equations are the way to solve this. Can you show your work? We can't really tell if your answer is right or not unless you show how you got it.
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