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in Figure 3, two boxes with masses mĄ=20 kg and mg=80 kg are connected to each
other with a massless cable passing over a frictionless pulley on an inclined surface with an inclination
angle e = 35.0°. The coefficient of static friction between the boxes is µs = 0.25. The motion of the
boxes is known to be impending.
Find the coefficient of friction between the box B and the inclined surface.
35
Figure 3

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