Question

why is friction a necessary evil? explain with examples

Answer 1

Answer:

Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. Hence it is considered as a evil. But almost all crucial tasks cannot be carried out without the presence of friction. ... Hence it is considered as a necessary evil

Answer 2

Answer:

because without friction we cannot walk or run

example

Cars and buses are around to move safely because of friction

friction causes nails and screws to hold on walls