Question

Which of these is the cause of Friction?

• A. Roughness of surfaces in contact
• B. Force of adhesion between the molecules of the surfaces in contact
• C. Both a and b
• D. None of the above

Answer 1

Answer:

C. Both a and b

Friction is the force that opposes the relative motion between the two surfaces of objects in contact. Friction is caused due to: 1. Roughness of surfaces in contact 2. Force of adhesion between the molecules of the surfaces in contact.