physics

posted by Tom

What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

  1. Elena

    If the carton is moved at uniform velocity ma=0
    F-F(fr) –mgsinα = 0
    F= F(fr) +mgsinα =μmgcosα+ mgsinα =
    =mg (μ•cosα + sinα)

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