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Determining speed and acceleration magnitude from graph

  1. Sep 11, 2009 #1
    1. The problem statement, all variables and given/known data

    http://img44.imageshack.us/img44/598/prob16aaccelx2.gif [Broken]

    1:At 7 sec, the speed is as high as it gets.
    2:The acceleration magnitude at 15 sec is ..... the acceleration magnitude at 38 sec.
    3:The x-acceleration is ..... zero at 58 sec.
    4:The speed is ..... zero at 23 sec.
    5:The speed at 46 sec is ..... the speed at 73 sec.
    6:The x-acceleration is ..... zero at 7 sec .


    2. Relevant equations

    The answers can be any of the following, True, False, Equal to, less than.


    3. The attempt at a solution

    1: True, because the speed is the slope of the line, and this is the steepest slope.
    2: Less than, because at 15 the acceleration is 0, and the acceleration at 38 is positive
    3:Less than, because the car is decelerating
    4: Equal to
    5: Greater than
    6: equal too, slope is constant


    I can't get all the answers right at once.

    If you could help that would be great!

    Thanks
     

    Attached Files:

    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Sep 11, 2009 #2

    berkeman

    User Avatar

    Staff: Mentor

    The image/attach didn't display. Try again?
     
  4. Sep 11, 2009 #3
    Thanks, it was showing up for me.

    But i will reupload it somewhere,
     
  5. Sep 11, 2009 #4
    Is the image showing up now?
     
  6. Sep 11, 2009 #5
    Guys, I need to get this in 1 hour!

    Please help correct me!
     
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