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Differential Equation and Newtons 2. law

  1. Sep 29, 2005 #1
    In a fluid, there's an exponential force F = -b*e^v working against the direction of movement. B is constant, and v is the objects velocity in m/s.

    They want me to use Newtons 2. law to find a differential equation for the movement of an object with mass m. The equation is separable, seperate so v is found on one side of the = and t on the other side.

    Could anyone please point me in the right direction here?
  2. jcsd
  3. Sep 29, 2005 #2
    what's F = ma in terms of a differential equation?

    (i take it that we want it in terms of velocity.)

    after you get that step, you equate it to that resistive force, and ... there ya go.
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