How is friction sometimes desirable?
Answers
Answer:
The oil coats the surfaces of the moving parts and makes them slippery. They slide over each other more easily, so there is less friction. ... In some cases, friction is desirable while in other cases, friction reduces the effectiveness of machines
Explanation:
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Answer :-
A friction is very much desirable to stop the body from its moving condition.
If there is no friction between the contact surfaces, then a body can't be stopped without the application of external force.
In the same time a person can't walk on the ground if there is no friction between the ground and our legs also no vehicle can run on the ground without the help of friction.
Some other examples :-
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.
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.