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Confused with this negative average velocity

  1. Jul 1, 2013 #1
    EDIT ADDED: I already got it! Thank you for your ideas! :D

    1. The problem statement, all variables and given/known data
    If you drive an average velocity of -72.8 Km/h for 55 minutes to a position that is 28.5 KM north of Jollitown, in what position did you start your drive?


    I'm confused with this negative average velocity, please help me
     
    Last edited by a moderator: Jul 1, 2013
  2. jcsd
  3. Jul 1, 2013 #2

    phinds

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    What do you think "negative" means in this context?
     
  4. Jul 1, 2013 #3
    I think it means that it have a negative velocity, and it opposes the direction at the origin, but I am still confused, I do not know where to start. If you can Provide me the answer I can figure it out how to solve it. Hahays, please help me.
     
  5. Jul 1, 2013 #4

    phinds

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    Draw a graph. Show the end point on the graph. Where do you have to start to end up there if you are going in a "negative" direction relative to the origin? Do you start North, South, East, or West of the end point?
     
  6. Jul 1, 2013 #5
    Is this Right? The starting position starts in (North) but it travels downward, that's why it is negative, so for the initial position of the car I need to compute the distance travelled in 55 minutes and then add it to the 28.5KM? If I only base my answer on the Y axis, does my negative indicates that I travel downward (backward) so the car travels going through the Origin Point? which is the intersection of X and Y axis in the cartesian plane?
     
  7. Jul 1, 2013 #6

    phinds

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    Do not erase original posts on this forum !!!!
     
  8. Jul 1, 2013 #7

    Redbelly98

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    fyi, the original post has been restored.
     
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