APFIVE Static Friction on an Inclined Plane
A box of mass m is placed on a rough inclined plane with coefficient of static friction μs. The incline makes an angle θ with the horizontal, where sin θ < μs cos θ. Using a coordinate system with one axis parallel to the incline, which equation correctly represents the condition for the box to remain at rest?
A
mg sin θ ≤ μs N
B
mg sin θ ≤ μs mg cos θ
C
mg cos θ ≤ μs mg sin θ
D
μs ≥ tan θ
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