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Homework Help: One Dimensional Motion

  1. May 20, 2010 #1
    1. The problem statement, all variables and given/known data
    Vehicle one driving 30 m/s. Slow moving vehicle 155 m ahead driving 5.00 m/s. Vehicle one brakes and decelerates at -2.00 m/s2. Is there a collision? If not whats the closest they get?


    2. Relevant equations
    Vehicle one info:
    Vi= 30 m/s
    A= -2 m/s2
    [tex]\Delta[/tex]X= 155 m

    Vehicle two info:
    Vi= 5.00 m/s


    3. The attempt at a solution
    I'm not sure how to set this one up. I'm not even quite sure if I should have the [tex]\Delta[/tex]X= 155 m. I know that I'll need to have an equation for each vehicle and then set them equal to each other, but I'm not sure which of the one dimension motion equations to use here.
     
  2. jcsd
  3. May 20, 2010 #2

    collinsmark

    User Avatar
    Homework Helper
    Gold Member

    Use the equation that has all of the following:
    Initial position
    Initial velocity
    acceleration.

    You can use the same equation for both vehicles. But you'll have to apply the equation differently to each vehicle. :wink:
     
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