Irregularities between two surfaces interlock to produce friction.

Explanation:
Friction is the force that opposes the relative motion or tendency of motion between two surfaces in contact. It is a result of the interlocking of irregularities between the surfaces. The irregularities or roughness on the surfaces create resistance, leading to the generation of frictional force. This statement is true and can be explained as follows:

1. Interlocking of irregularities:
When two surfaces come in contact, they may appear smooth at a macroscopic level, but at a microscopic level, they have irregularities or roughness. These irregularities can be in the form of bumps, ridges, or valleys on the surface. When the two surfaces are pressed together, these irregularities interlock with each other.

2. Contact points and friction:
The interlocking of irregularities creates contact points between the surfaces. These contact points are the areas where the surfaces are in direct contact with each other. Friction occurs at these contact points due to the resistance caused by the interlocking irregularities.

3. Resistance and frictional force:
As one surface attempts to slide or move relative to the other, the interlocking irregularities resist this motion. The irregularities act like tiny obstacles that need to be overcome. This resistance results in the generation of frictional force. The greater the irregularities and interlocking, the higher the frictional force.

4. Importance of friction:
Friction is an essential force in our daily lives. It allows us to walk, drive vehicles, grip objects, and perform various tasks. Without friction, objects would slide or slip uncontrollably. The interlocking of irregularities between surfaces provides the necessary grip and stability.

Therefore, the statement "Irregularities between two surfaces interlock to produce friction" is true. The interlocking of irregularities creates contact points and resistance, leading to the generation of frictional force.

Any surface that appears smooth to us actually has some irregularities....nd that irregularities interlock in each other to produce friction....for ex when we slide a book on a table, it stops after sometime bcs of this interlocking nd friction produced by it.