Question

The causes of friction are molecular adhesion, interlocking of surface irregularities and plowing effect.

• A. True
• B. False

Answer 1

The correct option is A True

The given statement is true. Friction can be explained using these three theories. Adhesion is the molecular force resulting from bond formation between two surfaces in contact. Interlocking of irregularities also offers resistance to relative motion between surfaces in contact. Soft surfaces develop friction because of deformation which we call as plowing effect.