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Homework Help: Exam coming soon, need help with this question!

  1. Feb 29, 2008 #1
    Exam coming soon, need urgent help with this question!

    1. The problem statement, all variables and given/known data
    A body leaves a point A and moves in a straight line with a constant velocity of 40m/s. Ten seconds later another body which is at rest at A is given an accelleration of 2m/s2 and moves in the same direction as the first body. How long does it take the second body to catch up with the first? How far from A does this occur?


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Feb 29, 2008 #2
    Use these:
    v=u+at
    [tex]s=ut+0.5at^2[/tex]
    [tex]v^2=u^2+2as[/tex]

    and come back with specific doubts.:rolleyes:
     
  4. Mar 1, 2008 #3
    I know im suppsed to use those equations but i dont know how? I dont know what to do with the 10 seconds.
     
  5. Mar 1, 2008 #4

    tiny-tim

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    Science Advisor
    Homework Helper

    Draw a picture!

    Sometimes a picture makes things clearer.

    Draw it for yourself (only roughly) on a graph (distance against time).

    Then I think you'll see where the 10 seconds comes in. :smile:
     
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