1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Frictional forces.

  1. Jan 9, 2005 #1
    Where does the equation F (force of friction) = uN (Muu times normal force)
    come from? How do you derive the u?
  2. jcsd
  3. Jan 9, 2005 #2
    derive? it is a property of substance.... the easiest way is doing an experiment....
  4. Jan 13, 2005 #3
    It comes from a good sounding phrase:

    "The force of friction is proportional to the normal force"

    This is translated in to f = mN.

    It isn't really worth anything to anyone, other then to show introductory students how complex phenomena can begin to be model. It is semi valid as a engineering rule, and good for teaching.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook