#### Frictional force

Asked by tasha.zapata007,

• 1 Likes
• 3 Answers
• Like
• Dislike
• Answer

#### Syed Ahsan Ali

49 weeks ago

Frictional force refers to the force generated by two surfaces that come in contact with each other and slip. These forces are mainly affected by the structure of the surface and by the amount of force that allows them together. The object's angle and location affect the frictional force strength.

#### shekinah_011

103 weeks ago

## TYPES OF FRICTION

Different types of motion of the object gives rise to different types of friction.Generally there are 4 types of friction they are Static friction, Sliding friction, Rolling friction, Fluid friction.Lets discuss about each type of friction in detail.

### STATIC FRICTION

Static friction exists between a stationary object and the surface on which it is resting.It prevents an object from moving against the surface.

Examples: static friction prevents an object like book falling from the desk even if the desk is slightly tilted, it helps us to pick up an object without slipping through our fingers.

When we want to move an object first we must overcome the static friction acting between the object and the surface on which the ob

When sliding friction is acting there must be another force existing to keep the body in moving,

### ROLLING FRICTION

Rolling friction is the resistive force that slows down the motion of a rolling ball or wheel. It is also called rolling resistance.

When a force or torque is applied to a stationary wheel, there is a small static rolling friction force holding back the rolling motion. However, resistance from static sliding friction is what really causes the wheel to start rolling. Rolling friction hinders the motion of an object rolling on a surface, that means it slows down the motion of an object rolling on a surface.

Examples: It slows down a ball rolling on a surface and it slows down the motion of tire rolling on the surface.

Like sliding friction here also another force is required to keep the object in motion, in case of pedaling bicycle the bicyclist provides the force which is required for the bicycle to be in

### LIQUID FRICTION

Here on Earth we tend to take air resistance (aka.“drag”) for granted. We just assume that when we throw a ball, launch an aircraft, deorbit a spacecraft, or fire a bullet from a gun, that the act of it traveling through our atmosphere will naturally slow it down. But what is the reason for this? Just how is air able to slow an object down, whether it is in free-fall or in flight? air friction is experienced by the objects moving through the open air. air friction acts between the object and the air through which it is moving. It is also called drag. This force depends upon the object's shape, material, speed with which it is moving and the viscosity of the fluid. Viscosity is the measure of the resistance of the air to flow and it differs from one density another.

Examples: It slow downs the motion of airplane flying in the air, here the engine of the airplane helps the plane to overcome the fluid friction and move for

### SLIDING FRICTION

Sliding friction occurs between objects as the slide against each other.

When sliding friction is acting there must be another force existing to keep the body in moving,

• Commands