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Contact Forces

  1. Feb 19, 2008 #1
    When two objects slide by one another, which of the following statements about the force of friction between them, is true?

    The frictional force is always equal to coefficient of kinetic Friction * normal force.

    The frictional force is always less than coefficient of kinetic Friction * normal force.

    The frictional force is determined by other forces on the objects so it can be either equal to or less than coefficient of kinetic Friction * normal force.

    I think its A because f=ukn

    thoughts?
     
  2. jcsd
  3. Feb 19, 2008 #2

    Doc Al

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    Staff: Mentor

    Sounds good to me (assuming the standard model of friction).
     
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