AP EAMCET · PHYSICS · Laws of Motion
Which of the following is true about the coefficient of static friction \(\left(\mu_s\right)\) and the coefficient of kinematic friction \(\left(\mu_k\right)\)
- A \(\mu_s\) is always equal to \(\mu_k\)
- B \(\mu_s\) is always greater than \(\mu_k\)
- C \(\mu_s\) is always less than \(\mu_k\)
- D Depending upon applications. \(\mu_s\) can be greate less or equal to \(\mu_k\)
Answer & Solution
Correct Answer
(B) \(\mu_s\) is always greater than \(\mu_k\)
Step-by-step Solution
Detailed explanation
Graph of friction is as shown So, Limiting value of static friction \(>\) Kinetic friction \( \begin{array}{cc} \Rightarrow & \mu_s N>\mu_k N \\ \text { or } & \mu_s>\mu_k \end{array} \)
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