Skip to main content

 FRICTION

The resistance offered by the surfaces that are in contact with each other when they move over each other.







Friction works in the opposite direction in which the body is moving making the body slow down. Friction is useful in most of the cases. Friction is also dependent on external factors.


CAUSES

When we see any object, we can see the smooth surface but when the same object is viewed under a microscope, it can be seen that even the smooth appearing object has rough edges. Tiny hills and grooves can be seen through the microscope, and they are known as irregularities of the surface.

So, when one object is moved over the other, these irregularities on the surface get entangled giving rise to friction. More the roughness, more will the irregularities and greater will be the force applied.


EXAMPLES

  • Friction finds application when matchsticks are ignited.
  • Motion of pistons in a cylinder is an application of friction.
  • It is possible to write on books and board as there is friction between pen and the board.

TYPES OF FORCES

  1. CONTACT FORCES
  2. NON CONTACT FORCES

CONTACT FORCES


Contact force is a force that is applied by objects in contact with each other. The contact force acts on a point of direct contact between the two objects

EXAMPLES
  • FRICTIONAL FORCE


NON CONTACT FORCES


A non-contact force is a force applied to an object by another body that is not in direct contact with it. Non-contact forces come into play when objects do not have physical contact between them or when a force is applied without any interaction.

EXAMPLES
  • GRAVITATIONAL FORCE






  • ELECTROSTATIC FORCE


  • MAGNETIC FORCE


Difference between Contact and Non-Contact Forces

Contact forcesNon-contact force
Contact force occurs due to the contact between two different objects.Non-contact force occurs due to either attraction or repulsion between two objects such that there is no contact between these objects.
There is no field linked with the contact force.There is always a field linked with non-contact force.
The frictional force is an example of a contact force.Gravitational force is an example of a non-contact force.

Comments

Post a Comment

Popular posts from this blog

  Theory of intelligence What is intelligence?   The word intelligence is derived from the word "intelligentia" which means "to understand". It is defined as the ability to perceive and retain the knowledge. Intelligence has been defined in many ways in terms of logic, understanding, self aware, learning, creativity etc. Many psychologists talked about the theory of intelligence like Spearmen, Thurstone, Gardner, Sternberg. Today we will discuss about " TRIARCHIC THEORY OF INTELLIGENCE " . In 1985 Robert Sternberg proposed theory. It is called TRIARCHIC theory because he talks about intelligence in three aspects . Kinds of intelligence? The three aspects are: PRACTICAL INTELLIGENCE CREATIVE INTELLIGENCE ANALYTICAL INTELLIGENCE 1 ) Practical intelligence : in this type sternberg talk about ability of a person to interact with everyday world successfully. it is also called "contexual intelligence". Such people deal with everyday task which is rel...
11 comments
Read more
 HAPPY NEW YEAR THE NEW YEAR IS HERE AND WE WILL BE OPENING THE BLANK PAGES OF OUR BOOK. THE CHAPTERS THAT WE LIVED IN 2020 ARE COMING TO AN END. THOSE CHAPTERS WERE GOOD AS WELL AS FEW WERE TERRIBLE.WHEN I GLANCE BACK TO THE MONTHS OF 2020  JANUARY GIVES ME MOTIVATION FEBRUARY WAS VERY PASSIONATE AND MERRY MARCH,APRIL,MAY,JUNE BECAME HARDEST FOR ALL OF US DUE TO THE OUTBREAK OF PANDEMIC, EVERYTHING WAS UNDER LOCKDOWN. DURING THAT TIME I HAD MANY MIXED FEELINGS. JULY FOR  ME WAS FORID LAZINESS AUGUST WAS VERY CHARMING AND CAPRICIOUS. IN SEPTEMBER AND OCTOBER I FELT A SPARK WITHIN ME , A NEW ENERGY. NOVEMBER AND DECEMBER WAS FULL OF HIDDEN SURPRISES. THIS WAS HOWW MY YEAR 2020 PASSED AND I BELIEVE YOU ALL HAD AN AMAZING YEAR TOO. BUT AS WE KNOW LIFE DOESNOT STOP FOR ANYONE SO MAKE THIS NEW YEAR 2021 A REMARKABLE YEAR WHERE YOU ACHIEVE YOUR GOALS.  WISHING YOU ALL FROM BOTTOM OF MY HEART A VERY VERY WONDERFUL FRESH START FILLED WITH JOY,PLEASURE AND SUCCESS. WISHING YO...
Post a Comment
Read more

Kvs: Admit card 2023

 KVS: Exam soon  As you all know exam of kvs is about to take place on the mentioned dates . Each one of you is feeling stressed out and are facing anxiety issues. Sleepness nights seems to be daily routine . Days are passing by but know you what one day everything will be ok….. here i am to help you all to reduce your stress . I am too an aspirant of kvs and i will discuss about things which i do to keep myself calm.  First of all just get up early morning . Drink warm water and put some honey in it. Just go out for a walk or do some yoga session to keep your brain calm and light of the day. Enjoy your breakfast with some nice and healthy, i prefer to eat poha with some fruits and juice. Next is start studying with a break after each session. Most importantly drink water every half hour or fifteen minutes this will give oxygen supply to brain and will provide some rest to your brain. Even try to listen songs after studying session to keep yourself at peace and to refresh...
Post a Comment
Read more