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Frictional force equation

  1. Jan 22, 2014 #1
    Why isn't the force of friction F= (frictional constant)(force of gravity)?
    Since F = mg(coefficiant)
    and g is negative denoting the direction of the vector, gravitational force.
    Last edited: Jan 22, 2014
  2. jcsd
  3. Jan 22, 2014 #2
    What if your sliding object is pushed down by an extra force or if it is sliding on a inclined or curved surface?
  4. Jan 22, 2014 #3
    The vector for friction is parallel to sliding surface and perpendicular to the normal force N. It is equal to the normal force multiplied by the coefficent of friction. The normal force N is a function of mass, g and the cosine of the inclination angle and whatever other forces that can be resolved in the normal direction.
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