Recent content by kristiakemi

  1. K

    2nd order differential equation

    I am currently solving a physics problem that requires me to solve the following equation m(d^2x/dt)=-gamma-c(dx/dt) but I can't seem to come up with a method that makes sense. Note: Gamma is just some constant. I tried to integrate both sides wrt t but then I end up with both a velocity...
  2. K

    What Initial Velocity Ensures a Glass Slides Off a Table with Coulomb Friction?

    its not? Thats how its defined in my book...it says exactly: F(friction) = -c(dx/dt) where c is a positive constant (c>0) referred to as the friction coefficient. This force-velocity relationship is called a linear damping force. We can assume that the frictional force is linearly dependent...
  3. K

    What Initial Velocity Ensures a Glass Slides Off a Table with Coulomb Friction?

    I think this is where I'm confused: the problem says the only force acting on it is from friction but there must be another force acting on it in the x direction in order for it to begin moving, right? Since the friction is working against the motion, I know that the F(friction)<Fpush...if there...
  4. K

    What Initial Velocity Ensures a Glass Slides Off a Table with Coulomb Friction?

    Homework Statement Consider a glass of mass m starting at x=0 and sliding on a table of LENGTH H. For what initial velocites V(naught) will the glass fall off the table if the only force is Coulomb friction? Homework Equations Fcoulomb = -c(dx/dt) where c >0 and is defined as the...
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