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Homework Help: Kinematics Constant Acceleration

  1. Sep 15, 2008 #1
    1. The problem statement, all variables and given/known data
    The instant the traffic light turns green a car accelerats at 3.2 m/s^2. At the same instant a truck travelling at 20m/s overtakes the car.

    a) How far until the car overtakes the truck

    b)How fast is the car travelling when it overtakes the truck.

    2. Relevant equations
    V1c=o VT=20.0 m/s
    D=? D=?
    a1=3.2m/s^2 t2=D/20
    t1=? a=0 m/s^2

    3. The attempt at a solution
    D1=V1t +1/2at^2
    The last part is where I am stuck. I dont know how to properly square a number/number.
  2. jcsd
  3. Sep 15, 2008 #2
    Try dividing both sides of the equation by D.
  4. Sep 15, 2008 #3
    alright I figured it out, thanks for the help. Its much appreciated.
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