Question

Which of the following statements is true about kinetic friction?

• A. It is a self-adjusting force.
• B. It depends on the external force applied on the body.
• C. It depends on the area of contact.
• D. It depends on the nature of surfaces of contact.

Answer 1

The correct option is D It depends on the nature of surfaces of contact.

Kinetic friction is independent of area of contact. It depends on the nature of surface of contact and is independent of the external force applied.