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Work Done by a General Variable Force

  1. Oct 11, 2008 #1
    A 8 kg brick moves along an x axis. Its acceleration as a function of its position is shown in Figure 7-37. What is the net work performed on the brick by the force causing the acceleration as the brick moves from x = 0 to x = 8.0 m?

    [​IMG]

    What I tried to do is find the area and multiply by the mass, but it doesn't work.

    Please help.


    Edit: Never mind it worked. I just typed it in wrong. But I have another concern.

    Is there any additional ways to solve this problem other than the one I mentioned? I was looking at someone else's work and that person did something with the slope. How does that work?
     
    Last edited: Oct 11, 2008
  2. jcsd
  3. Oct 11, 2008 #2
    By looking at it I could see that if they take info from the slope they would appear to be taking a longer route, finding the slope just cancels the displacements.
     
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