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Velocity Time Graph

  1. Feb 19, 2017 #1
    • Member advised to use the homework template for posts in the homework sections of PF.
    Hi Guys,

    I have attempted the question below and would greatly appreciate if I can get some feedback.

    A dog's position is recorded in the graph below. Determine the velocity of the dog in all three segments. Sketch the corresponding Velocity-Time Graph. Please See the attached image.

    Here are the velocities that I got:

    A = 2 m/s
    B = 0 m/s
    C = -2.42 m/s

    Now for the graph that I will make for velocity-time. Do I just use 10, 20, and 28.25 as x-values and then 2, 0, and -2.42 as y-values?
     

    Attached Files:

  2. jcsd
  3. Feb 19, 2017 #2
    For c, it looks like he moves 15 meters in 6.667 seconds. Edit: -> It looks like it intersects exactly where those two gridlines meet.
     
  4. Feb 19, 2017 #3
    So you are saying the dog doesnt go all the to 0? So if thats the case is the velocity then 2.27 m/s?
     
  5. Feb 19, 2017 #4

    ehild

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    upload_2017-2-20_6-12-16.png
    The y values are 20 m, 20 m and 0 m, but it is more accurate to read Δx and Δy from the blue triangle.
    upload_2017-2-20_6-12-16.png
     
  6. Feb 19, 2017 #5
    The dog definitely goes to back to y = 0. I am just saying that the point x=26.6666, y = 5 is a lot easier to read than the point at y=0.
     
  7. Feb 19, 2017 #6
    Ok that is interesting. Thank you guys!!
     
  8. Nov 13, 2017 #7
    How did you get this number?
    C = -2.42 m/s
     
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