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Using the diagram above, the coefficient of kinetic friction for copper is ____ (Your answer should be given to the nearest thousandths.)
This coefficient _____ applies to all similar copper surfaces.

Using the diagram above the coefficient of kinetic friction for copper is Your answer should be given to the nearest thousandths This coefficient applies to all class=

Respuesta :

Answer:

 μ= 0.0375,  kinetic

Explanation:

For this exercise we set a reference system with the x axis parallel to the chord

Y axis  

      N - W = 0

      N = W

     

X axis

      T - fr = 0

the expression for the friction force is

      fr = μ N

       

we substitute

       T - μ W = 0

       μ = T / W

we calculate

         μ = 1.5 / 40

        μ= 0.0375

coefficient of kinetic friction

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