AP Physics 1hardmcq1 pt
A crate slides down a 37° incline with constant velocity (sin 37° = 0.60, cos 37° = 0.80). The coefficient of kinetic friction is
A.0.75
B.0.60
C.0.80
D.1.33
Explanation
Core Concept
Constant velocity: mg sinθ = μ_k mg cosθ, so μ_k = tan 37° = 0.60/0.80 = 0.75.
Correct Answer
A0.75
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