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Homework Help: Quick Question (Position vs Time Graphs) True/False (Due soon!)

  1. Feb 2, 2009 #1
    1. The problem statement, all variables and given/known data

    True Or False

    In the position vs. time graphs above, all times are in seconds and all positions are in meters.

    Which of the following statements are true about the graphs shown above? Hint: keep in mind that velocity is a vector and speed is a scalar.
    The average velocity is constant in Figures C and D
    The average velocity is positive in Figure E
    The object is at rest all of the time in Figure F
    The net displacement is negative in Figure E
    The average velocity is non-zero in Figure F


    2. Relevant equations

    3. The attempt at a solution

    I'm guessing

    1.True, derivative of the graphs give you a positive constant
    2. False, slope is downwards
    3. False, moves up then down
    4. Don't know
    5. Don't know

    Some help please! Some hints
    Last edited: Feb 2, 2009
  2. jcsd
  3. Feb 2, 2009 #2
    i can't see any graph in the link you gave...
  4. Feb 2, 2009 #3
    heh sorry
  5. Feb 2, 2009 #4
    1) the only way it makes sense to me is to compare the velocities in C and D, and they are not same (probably i'm messing up with the terminologies, a second opinion would help)



    4)what is the definition of displacement? is there any difference in the initial and final position of the object?

    5)what is the definition of average velocity? The answer would follow once you get the above part.
  6. Feb 2, 2009 #5
    Thanks, got it now

    it was

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