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Homework Help: Average Velocity on a Position vs Time Graph

  1. Jun 9, 2010 #1
    A graph of position versus time for a certain particle moving along the x axis is shown in the figure below. Find the average velocity in the following time intervals. (The horizontal axis is marked in increments of 1 s and the vertical axis is marked in increments of 2 m.)

    avg velocity = change in x / change in y

    a. v= 2/10 = 0.2
    b. v= 4/5 - 0.8
    c. v= 2/0 = 0
    d. v= 3/10 = 0.3
    e. v= 8/5 = 1.6
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. Jun 9, 2010 #2
  4. Jun 9, 2010 #3
    I am sorry. I thought velocity-time graph. It is displacement- time graph. For displace-time graph,

    average velocity=(x2-x1)/(t2-t1)

    For example ,
    0 to 2s,
    average velocity=10/2=5 ms-1
    2 to 4s
    average velocity=(10-5)/2= 2.5 ms-1
    4 to 5s
    average velocity=0
    5 to 7s
    average velocity=5 ms-1
    7 to 8s
    average velocity=10/2=5 ms-1
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