Question

What do you mean by friction?
( In 15-30 word )
​

Answer 1

Answer:

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.

There are several types of friction: ... Fluid friction describes the friction

between layers of a viscous fluid that are moving relative to each other.

Answer 2

Friction is a type of relative force that acts as a resistance between two bodies that are in contact with each other. In other words when two bodies are in contact with each other there exists a force which opposes their relative motion.It is also called as kinetic friction. It is that force that keeps a surface sliding with another surface. For example, if book is kept on floor and the book moves with respect to the floor. It is the frictional force between two surfaces that are rubbing against each other.