Wednesday, March 13, 2013

Ways Friction Can Be Helpful

Friction is defined as the force which opposes the relative motion between two surfaces which are in contact with each other. There are three types of friction namely static friction, dynamic friction and rolling friction.

·         Static friction – The frictional force which exists when there is no relative motion is called the static friction. The force which makes the surface just to slide, is called limiting friction.

·         Dynamic or sliding friction – the frictional force that exists between the two surfaces when there is a relative motion between them is called dynamic friction.

·         Rolling friction – The frictional force that exists between he two surfaces when there is a rolling motion between them is called rolling friction. I like to share this Emp Electromagnetic Pulse with you all through my article.


Examples


Advantages of friction

It is often thought that friction is a nuisance and that it should be reduced to a minimum. However a frictionless world would not at all be convenient. Most of the daily activities are dependent on friction. They are:

1)      Without friction the objects would slide of the table unless it is perfectly horizontal.

2)      It would be difficult to sit on a a chair without friction

3)      Friction helps in supporting a ladder inclined to a wall

4)      Friction provides reaction to move car and train

5)      Brakes ina vehicle depend on friction

6)      We would not be able to walk if there had been no friction between the sole of our shoes and the ground

7)      It is the friction between the belt and the pulley that helps in the rotation of various parts of a machine.

8)      A billiard player depends on the force of friction between the ball and the end of his cue for a good shot.

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conclusion


Thus we see that friction is also a blessing in disguise and forms an inevitable part of one's life

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