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Find force from a function of displacement?

  1. Sep 18, 2005 #1
    An object with mass m moves along the x-axis. Its position as a function of time is given by x(t)=At-Bt^3, where A and B are constants. Calculate the net force on the object as a function of time.

    I have no idea as to how to begin.
    Thanks for anyone's help.
    :confused: I dont know !&@#%^@%!$^$(! about doing this kind of calculus problem.

    But I see some correlation between this function and the formula X=X+vt+1/2at^2
    Last edited: Sep 18, 2005
  2. jcsd
  3. Sep 18, 2005 #2
    Well don't over complicate the problem, F=ma right? Now all you have to do is figure out how to get from position to acceleration. Hope that helps.

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