Types of Friction

Types of Friction. Created by group 3.

There are four types of friction we shall learn them in upcoming slides.

First we shall learn what is friction ?. have you ever thought why your bicycle stops when you apply brakes ? If you guess right it is friction but actually what is friction? Friction can be defines as the force that oposses the motion of an object for ex –if you roll the ball on the ground ,you will see that it stops after some time the motion of the ball is opposed by the force of the friction exerted by the ground on the ball.

we think that now you have finally understood the meaning of friction.

Four types of frictio are static friction ,sliding friction ,rolling friction and fluid friction.

This type of friction exist between two bodies that are relatively at rest even though an external force is acting on them before every object sets into motion ,static friction has to be overcome for example when you apply force to move a heavy box from one place to another a force is required to overcome friction so that it can start moving from rest the maximum force of friction that can be generated between two static surfaces is call limiting friction.

Sliding friction[kinetic friction]. We can understand sliding friction as the resistance force created between any two bodies when sliding against each other. This friction is also called kinetic friction and it is defined as the force that is required to keep a surface sliding along another surface. In most materials, sliding friction is much less Imagine a car parked on an inclined plane with less gradient. In the absence of sliding friction, the wheels of the car will begin to rotate and start moving. This is the reason, at steep gradients, hand brakes are used while parking and in worst cases, heavy stones are placed behind the tires. Sliding friction, because of a considerable level, in a way is helpful in real life.A few examples like sliding friction• Pushing a heavy and bigger object such as a crowbar • Ribbing a weight on ramps are some examples of sliding friction.

Rolling frction. Rolling friction is the resistive force offered by any surface which opposes the rolling motion of any object that rolls over it, thus causing it to slow down and eventually stop. Rolling friction occurs when a spherical or round object rolls across a surface. Rolling friction is also sometimes called rolling drag or rolling resistance..

Fluid friction. Liquids and gases are called fluids. All fluids exert a force of friction on objects that move through them, which is called drag. The frictional force exerted by gases and liquids depends upon the shape, material and speed of the object moving throughLiquids and gases exert lesser friction as compared solid surfaces..

Vote of thanks. Thanks to our class teacher preamlata teacher to giving us this Opportunity Thank you and have beautiful day ahead.