When an object slides at constant speed down an inclined plane, the coefficient of friction may approximately be:
Correct answer: C. tan Ө
- A. sin Ө
- B. cos Ө
- C. tan Ө
- D. cot Ө
Explanation
For the object to slide at a constant speed, the frictional force must be equal to mgsinθ.μN=mgsinθSubstituting the expression for N gives:μ(mgcosθ) =mgsinθSolving for μ gives:μ=sinθ/cosθ =tanθ
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