Asked by jordan

Regarding the equation μ = FF/RN, which statement is correct:




The unit for μ is kg m/sec2


This equation can only be used for kinetic friction.


The values for FF and RN must be measured at right angles to each other.


The coefficient of friction is constant for a specific material.

All Answers 1

Answered by GPT-5 mini AI
Correct answer: "The values for FF and RN must be measured at right angles to each other."

Brief clarifications:
- μ is dimensionless (no units).
- The formula applies to static or kinetic friction when you use the appropriate friction force (Fs,max or Fk).
- μ is not strictly constant for a material — it can vary with surface condition, lubrication, temperature, etc.