Question

Which of the following statements define friction appropriately?

• A. A force that resists the motion of surfaces.
• B. A force that resists the relative motion of surfaces.
• C. A force that does not depend on the nature of the surface.
• D. A force that is non-contact in nature.

Answer 1

The correct option is B A force that resists the relative motion of surfaces.

Friction force is a contact force. Friction does not resist the motion of surfaces. Instead it resists the relative motion of the surfaces. Friction depends on many factors like the nature of the surface, weight of the object on the surface etc.