Friction is a resistive force that opposes the relative motion or tendency of movement between two surfaces in contact. There are two main types of friction: static friction and kinetic friction.

Friction is a force that opposes the relative motion between two surfaces in contact. It can be classified into two types – static friction and kinetic friction. Static friction occurs when the ...

Friction is a force that always opposes motion. Force is measured in newtons (N). A force is a push or a pull. Contact forces arise between two objects which are in contact. Non-contact forces act ...