Surface Area frictional force

  • Thread starter k31453
  • Start date
  • #1
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Homework Statement


does surface area to affect the values of coefficient µk?


Homework Equations



frictional force =µk * normal force


The Attempt at a Solution


I know that if mass is larger then the frictional force is higher( f= ma)
but how about the surface area? does it affect the coefficient of kinetic or static force??
 

Answers and Replies

  • #2
33
3
Surface doesn't affect the friction. If the mass is larger then the frictional force is larger due to the increase of normal force. Especially:
Frictional force = μk * normal force
*μk depends only by the nature of the surfaces in touch
 
  • #3
20,781
4,505
If the normal force is held constant, but distributed over a larger area, then the normal force per unit area decreases, but so also does the frictional force per unit area. The net result is that the overall frictional force remains the same.
 
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