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Homework Help: What should be on the x and y axis of this graph?

  1. Sep 23, 2007 #1
    The question is:

    Plot a graph of the acceleration (vertical axis) as a function of the net force for the trials in which the mass remained constant. Draw a line of best fit and calculate its slope. What does the graph indicate about the relationship betweena cceleration and net force?

    What should be on my x and what should be on my y axis?
  2. jcsd
  3. Sep 23, 2007 #2


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    acceleration (vertical axis)---y
    net force for the trials---x
  4. Sep 23, 2007 #3
    How do I figure out net force???
    The experiment is a cart with weights with a string attatched to it, the string dangles over a pulley that is attatched to a flat desk and the weights on the end of the string use the force of gravity to pull the cart forward until the weight on the end of the string touches the floor.

    http://img210.imageshack.us/img210/6541/untitledab4.jpg [Broken]
    That is what the experiment looks like, and this is what my chart looks like:
    http://img338.imageshack.us/img338/7705/adadwr0.jpg [Broken]
    Note, total mass factors in the weights on the string too.

    So far I have done:

    Fa = applied force
    Ff = friction force
    m = mass (kg)
    a = acceleration (m/s^2)

    Fa + Ff = ma
    Ff = ma - Fa
    Ff = (.557)*(.43) - .39
    Ff = -0.15049

    Fnet = Ff + Fa
    Fnet = 0.23951

    Is this correct?

    Also how do you figure out Net force to mass? I did this for the first row netforce/kg one.
    Fnet = ma
    Fnet = .557*.43
    Fnet = .23951

    So the mass of the first one is .557.
    .43 N/kg
    Last edited by a moderator: May 3, 2017
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