Question

Explain with four examples that sometimes, force of friction is desirable.

Answer 1

Explanation:

1)There is a design under our shoes which helps to reduce fiction.

2)when we write on a blackboard with chalk.

3)when we hang our bags on our sholders.

4) we can burn matchstick

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Answer 2

Explain with four examples that sometimes, the force of friction is desirable.

I. Halting of vehicles – If there were no rubbing then we can't stop our vehicles and the vehicles continue to go and never stop yet there is grating which assists us with halting our vehicles since it goes against movement generally.

II. Composing – When we compose on paper or board then the pencil lead gets delayed the paper because of rubbing and gets saved on the sight where we move it, in the event that there was no contact then there would be no composition on paper with a pencile.

III. Strolling on the ground – When we stroll on the ground it is because of grinding which gives us forward response power because of which we can walk and on the off chance that there was no contact then we couldn't walk. IV. Picking of items – When we pick protests this is simply because of the power of grating since gravity is continually following up on objects and assuming we pick an article its net power ought to be zero altogether it to not to move.