Question

explain different types of friction

Answer 1

ANSWER

DIFFERENT TYPES OF FRICTION


There are four types of friction:

static, sliding, rolling, and fluid friction. Static, sliding, and rolling frictionoccur between solid surfaces

. Static friction is strongest, followed by sliding friction, and then rolling friction, which is weakest.

Fluid frictionoccurs in fluids, which are liquids or gases.


I HOPE THIS INFO HELPS U

Answer 2

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 object is resting.



A stationary book on surface

SLIDING FRICTIONEdit

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,

ROLLING FRICTIONEdit

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 motion.



A ball rolling on a surface

Air FRICTIONEdit

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 forward.



A plane in the air

NOTE:sliding friction, rolling friction, and air friction are types of dynamic friction