Question

Which of the following factors are responsible for friction?

• A. Adhesion or stickiness
• B. Plowing effect
• C. Surface roughness
• D. Density of the object

Answer 1

Answer: (A), (B), (C)

Surface roughness

Factors responsible for friction are:

1. Adhesion or stickiness - This gives rise to friction when two smooth, even surfaces slide over each other.
2. Plowing effect - This is when one of the surfaces is smooth and has scope for surface deformations when an object slides on it.
3. Surface roughness - This is when the irregularities present on the surfaces interlock with each other.