Question

Consider the following statements A Frictional force is dependent of area of contact B Frictional force acts in tangential direction to the surface in contact C Maximum value of static friction is known as limiting friction D Dynamic friction is also known as kinetic friction

• A. A and C only
• B. B and D only
• C. A, B, C and D
• D. A, B and D only

Hint:

Limiting friction is the maximum static friction that occurs just before motion begins and kinetic friction acts once the surfaces start sliding

Answer 1

The Correct Option is C

- Statement (A) is false; frictional force relies on surface characteristics and normal force, not contact area.
- Statement (B) is true, as frictional force consistently acts tangentially to the contact surface.
- Statement (C) is true; limiting friction represents the maximum static friction.
- Statement (D) is true; dynamic friction, or kinetic friction, occurs during relative surface motion.