Question

what is friction? write thier types​

Answer 1

$\huge{{\bold{\blue{✎ANSWER}}}}$

There are four types of friction: static, sliding, rolling, and fluid friction (Air/Viscous friction). Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and gases. Static friction acts on objects when they are resting on a surface.

Answer 2

Answer:  Friction-Friction is that force which opposes the motion of two objects upon each other. Friction generates only when two objects are in contact with each other

Types of friction:  

(i) Static friction

Static friction acts on objects when they are in a rest position. When both objects are a rest or one object is little tilted then the friction which resist the motion is known as Static friction

(ii) Sliding friction

Sliding friction is that friction which acts on objects when they are sliding over a surface. Sliding friction resists the sliding motion of the objects, this friction is weaker than the static friction, therefore, we can easily slide any object on the surface easily.

(iii) Rolling friction

Rolling friction is that friction which acts on the object when they are rolling over a surface. This friction is weaker than static and sliding friction. This type of friction acts upon vehicles because the wheels roll on the surface.

(iv) Fluid friction

Fluid fiction is that fiction which acts upon objects that are moving through fluids. This type of friction develops in liquids, gases or oils. Whenever water passes through a pipe the friction develops between the inner layer of pipe and particles of water (in the opposite direction) to resist the flow of water.

(v) Kinetic friction

Kinetic friction is that friction which acts upon two objects sliding on moving on each other. It is exerted by one surface to another when two surfaces rub against each other. The magnitude of the force will depend on the coefficient of kinetic friction between the types of materials of the matter