How Do You Calculate the Coefficient of Kinetic Friction on a Ramp?

In summary, using the equations μk = Fk/Fn and Fn = mass x gravity, the coefficient of kinetic friction (μk) between a box and a ramp can be determined by finding the forces acting parallel to the ramp (weight and friction), adding them up to get the resultant force, and solving for μk using the equation μk = (gsinθ - a)/gcosθ.
  • #36
ughschool said:
gsinθ - μkgcosθ = a?

This is what it should be. So solve for μk now.
 
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  • #37
gsinθ-a/-gcosθ=uk?
 
  • #38
ugh wait no sorry
gsinθ-a/gcosθ=uk?
 
  • #39
ahhhhhhh is it + or -?
 
  • #40
i think its -
 
  • #41
ughschool said:
ugh wait no sorry
gsinθ-a/gcosθ=uk?

This is correct. So just substitute your values.
 
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