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 as frictional force is not directly dependent on the area of contact, but rather on the nature of the surfaces in contact and the normal force.
- Statement (B) is true since frictional force always acts in the tangential direction to the surface in contact.
- Statement (C) is true because the maximum value of static friction is known as limiting friction.
- Statement (D) is true as dynamic friction is also referred to as kinetic friction, which occurs when the surfaces are in relative motion.