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Homework Help: Help with acceleration problem

  1. Sep 28, 2016 #1
    1. The problem statement, all variables and given/known data
    A police car stopped at a set of lights has had a speeder pass it at 100km/hr. if the police car can accelerate at 3.6m/s^2, how long does it take to catch up to the speeder

    2. Relevant equations
    I'm not sure what I can do with the given info

    3. The attempt at a solution
    Same as above
  2. jcsd
  3. Sep 28, 2016 #2
    You must have been given some equations to look at? Are you using a textbook? No notes from class? This should be a plug and chug type problem.
  4. Sep 28, 2016 #3
    there is nothing, it was a sheet online that my teacher gave to me.
    We just started physics, and are currently on the unit of Motion in a straight line in kinematics. we were told to use any formulas we know (5 main kinematics) but im not sure where to find the remaining variable
  5. Sep 28, 2016 #4
    Is it possible to link to that sheet here?
  6. Sep 28, 2016 #5

    Attached Files:

  7. Sep 28, 2016 #6
    does that help?
  8. Sep 28, 2016 #7


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    Staff: Mentor

    What are the kinematics equations that you know?
  9. Sep 28, 2016 #8
    there called the 5 main kinematics equations. its faster to search it up then putting them in this
  10. Sep 28, 2016 #9
    You got to work with us. Which of the equations is your best guess to use?
  11. Sep 28, 2016 #10
    its ok, i figured it out, thanks
  12. Sep 28, 2016 #11
    Some other readers may be interested how you figured it out?
  13. Sep 28, 2016 #12
    I put the information from the cop into 2 separate formulas. Then I substituted 1 formula into the other, creating a quadratic. I then used the quadratic formula, keeping the positive amount as my final answer
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