Q. 194.8( 4 Votes )
Explain with four examples that sometimes, force of friction is desirable.
Force of friction is desirable in many cases for example:–
I. Stopping of vehicles – If there were no friction then we cannot stop our vehicles and the vehicles keeps on going and never stop but there is friction which helps us to stop our vehicles because it opposes motion always.
II. Writing – When we write on paper or blackboard then the pencil lead gets dragged on the paper due to friction and gets deposited on the sight where we move it, if there were no friction then there would be no writing on paper with pencil.
III. Walking on ground – When we walk on the ground it is due to friction which gives us forward reaction force due to which we are able to walk and if there were no friction then we were not able to walk.
IV. Picking of objects – When we pick objects this is only due to force of friction because gravity is always acting on objects and if we pick an object it’s net force should be zero in order it to not to move.
Rate this question :
What is the direction of force of friction acting on a moving object ?Lakhmir Singh & Manjit Kaur - Science
Explain with four examples that sometimes, force of friction is desirable.All in One - Science
What is the cause of friction? Explain with the help of a labelled diagram.Lakhmir Singh & Manjit Kaur - Science
A car is moving towards North. What will be the direction of force of friction acting on this car due to surface of road ?Lakhmir Singh & Manjit Kaur - Science
Write some disadvantages of force of friction.All in One - Science
Write the use of friction.All in One - Science
Name the force which always opposes motion.All in One - Science
You might have noticed that when used for a long time, slippers with rubber soles become slippery. Explain the reason.NCERT - Science Exemplar