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Homework Help: Newton's second law lab graph

  1. Feb 3, 2008 #1
    Graphs Of Acceleration And Force


    We did this lab....on Newton's Second Law. we are trying to prove the formula F=ma...

    Now i drew this graph of acceleration vs time and force vs time....they look similar..how can i interpretate them?

    someone help!!!! MY lab is due tomorrow!!!
  2. jcsd
  3. Feb 3, 2008 #2


    Staff: Mentor

    They are supposed to look similar, they are only different by a scaling factor (mass). In fact, if instead of plotting each against time, if you were to plot force as the y axis and acceleration as the x axis then you should get a straight line with slope equal to m.
  4. Feb 3, 2008 #3
    ok..thas true...but now the problem is that....i have plotted force on y axis and acceleration on x-axis....and i calculated their slope and found an equation....the slope is suppose to be the mass of the object rite?
    but I am getting smthing slightly different.
    Actual mass is 1.04kg and the mass that i calculated was 1.13kg. Why are they different?
  5. Feb 3, 2008 #4
    Your measurements need to be more precise. I think acceleration measurement is not easy.
  6. Feb 3, 2008 #5
    oh thanks....

    what am i suppose to do here?

    Compare the graphs of force vs. time and acceleration vs. time for a particular trial.

    What do i do here...i am confused :S
  7. Feb 3, 2008 #6


    Staff: Mentor

    <10% experimental error is probably quite good for the kind of experimental setup you would usually have at a typical school lab.
  8. Feb 3, 2008 #7
    oh thanks...dale and pixel
  9. Feb 3, 2008 #8
    HOw do u compare acceleration vs. time and force vs. time graphs?

    PLz help pplz
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