Discussion
If \(f_{s}\) and \(f_{k}\) represent the coefficeints of static friction and kinetic friction of the relative motion between two surfaces in contact with area A , then
Answer: C
The correct statement is that \(f_{s}\) and \(f_{k}\) are independent of A.
The laws of friction say that friction depends on the normal force and the nature of the surfaces, not on the apparent area of contact: a larger area spreads the same load more thinly, and the real contact area stays proportional to the load. So both coefficients are independent of \(A\).
The kinetic coefficient is normally smaller than the maximum static one, not greater, and it is static friction, not kinetic, that opposes impending motion; kinetic friction opposes actual sliding.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development